1. Introduction
With the acceleration of globalization and industrialization, labor migration from agriculture to more productive non-agricultural sectors has become prevalent [
1,
2,
3]. This shift has led to the economic decline of rural areas. For instance, in the BRICS countries, the rural population percentage from 1960 to 2023 decreased by 21% in Russia, 18% in India, 22% in South Africa, 42% in Brazil, and a significant 49% in China (World Bank Data). This trend is widespread globally and more pronounced in rapidly developing countries (see
Figure 1). The drastic reduction in rural populations not only triggers rural decline [
4] but also severely threatens the sustainable livelihoods of farmers. Rural decline is typically characterized by a downward spiral of diminishing employment opportunities, depopulation, economic depression, and deteriorating quality of life in rural areas [
5,
6,
7,
8,
9]. In countries like Nigeria and India, the massive influx of impoverished farmers has exceeded the urban job market’s capacity. Combined with the economic deterioration of rural areas and ineffective rural transformation strategies, this has led to the formation of slums [
10,
11]. However, research and data suggest that implementing effective rural transformation strategies can lead to faster, more stable, and inclusive economic growth [
12,
13,
14]. Therefore, exploring and implementing rural transformation strategies that are tailored to national contexts to foster endogenous rural development and explore practical solutions for increasing farmers’ incomes is a global challenge that needs to be addressed.
The Chinese government places great importance on farmers’ incomes. The No. 1 Central Document highlights the need to “improve rural industries, construction, and governance to increase farmers’ incomes”, providing a solid policy foundation and clear direction for China’s future rural transformation. Data show that by 2023, Chinese farmers’ incomes had increased fivefold compared to the beginning of the century, underscoring the significant achievements in rural economic development. Nonetheless, China’s rural development still faces several constraints, such as a single agricultural industrial structure, low added value of agricultural products, and insufficient agricultural technology support, which hinder sustainable rural development and the potential for farmers’ income growth [
15,
16,
17]. Therefore, to fundamentally solve the dilemma of increasing farmers’ incomes, breakthroughs must be sought within rural areas by promoting rural transformation to expand value-added and efficiency-enhancing opportunities [
18,
19,
20]. Against this backdrop, this study focuses on the common issues of global rural decline and examines the practical cases from a Chinese perspective to explore the relationship between rural transformation and farmers’ income, aiming to provide valuable insights for global rural development and transformation.
Existing research highlights that the causes and strategies for addressing rural decline vary across countries. In Europe, rural decline is primarily driven by population outflows and reductions, severely impacting the social fabric of rural communities [
21,
22]. North America’s rural issues stem from globalization and economic restructuring, leading to the hollowing out of rural industries and the erosion of traditional social order [
23,
24]. In Japan, rural decline is closely linked to post-war, urban-focused reconstruction policies and an aging population [
25,
26]. To counter these challenges, countries have adopted diverse rural transformation strategies. The U.S. supports rural revitalization through economic rejuvenation plans and infrastructure improvements [
27]. The European Union implements the Common Agricultural Policy (CAP) and promotes rural tourism [
28,
29]. Japan addresses rural decline through initiatives like the “Sixth Industrialization” and comprehensive rural revitalization strategies [
30]. Collectively, these countries prioritize rural transformation as a core approach to promoting sustainable rural development. Research on rural transformation has accumulated substantial findings. Huang et al. (2020) define rural transformation as the process encompassing increased agricultural productivity, commercialization, diversification of production models and livelihoods, and the shift towards non-agricultural employment [
31]. Kim and Yang (2016) and Wu et al. (2022) use the “Population-Land-Industry” (PLI) index, establishing a three-dimensional system to measure rural transformation [
32,
33]. Long et al. (2011) further subdivide rural transformation into three aspects: rural development, transformation, and urban-rural coordination, providing a more detailed assessment method [
34]. Dong and Chen (2023) categorize rural transformation into four factors: productivity, rurality, inclusiveness, and sustainability [
35].
In terms of driving factors, the advancement of rural industrialization and urbanization is considered crucial for rural transformation [
36]. The improvement of transportation networks is also seen as a significant driving force [
37]. Regarding the social welfare effects of rural transformation, Sudaryanto et al. (2023) analyze data from Indonesia, revealing that rural transformation promotes agricultural growth and economic diversification in rural areas, significantly increasing the proportion of non-agricultural employment and positively impacting rural household incomes and poverty reduction [
38]. Farooq and Farah (2023) also find that rural transformation in Pakistan plays a vital role in increasing farmers’ incomes and reducing poverty [
39]. Rola-Rubzen et al. (2023) highlight that rural transformation significantly enhances women’s employment opportunities, rights, and income levels [
40].
The existing literature extensively explores the causes and strategies of rural decline across different countries but often lacks empirical evidence from China. This study addresses this gap by analyzing micro-level data from 15 Chinese provinces, revealing unique rural transformation pathways and outcomes specific to China. While most research focuses on traditional dimensions like population, land, and industry, our study incorporates digital and ecological factors, creating a comprehensive evaluation framework. Additionally, the mechanisms through which rural transformation affects income growth remain underexplored, often treated as a “black box”. This study aims to unpack these mechanisms, offering both theoretical insights and practical guidance for rural revitalization in China and globally and providing valuable references for inclusive rural development strategies.
The remainder of the paper is organized as follows:
Section 2 presents the theoretical analysis and research hypotheses;
Section 3 outlines the data, variables, and identification strategy;
Section 4 discusses the empirical analysis and findings;
Section 5 provides a discussion of the results and their implications, and
Section 6 concludes with research conclusions and policy recommendations.
3. Materials and Methods
3.1. Data Source
This study utilizes data from the “China Rural Micro-Economic Data” collected by the Institute of Agricultural Economics and Development at the Chinese Academy of Agricultural Sciences in 2022. The data focus on micro-economic information at the administrative village and household levels. The village survey collects data across five dimensions: basic village information, economic development, governance, social development, and ecological construction. The household survey includes 344 indicators covering basic household information, production and business activities, household income and expenditure, and evaluations of service needs and village governance participation.
This study’s sample selection covered 15 provinces across China’s eastern, central, and western regions, specifically Anhui, Fujian, Hebei, Henan, Heilongjiang, Hubei, Hunan, Jilin, Jiangsu, Shandong, Sichuan, Xinjiang, Yunnan, Zhejiang, and Chongqing. The choice of these provinces was due to China’s vast geographical diversity and logistical constraints, which made full nationwide coverage impractical. These selected provinces are highly representative as they encompass various regional types, including coastal, inland, and minority areas, capturing a wide range of economic and social conditions. This approach ensures a robust reflection of China’s rural transformation and farmers’ income dynamics.
To ensure representativeness and randomness, the sampling rule was to select three counties (or cities/districts) per province, three administrative villages per county, and 20 households per village for questionnaire surveys. This method resulted in a large sample of individual farmers, with 5520 valid farmer samples retained for empirical research after excluding samples with missing data.
3.2. Variable Selection
3.2.1. Core Explanatory Variable
The core explanatory variable in this study is rural transformation (RT). Drawing from existing research [
13,
32,
33,
34] and incorporating the significance of the digital economy and green development for rural transformation, we constructed an indicator system from six dimensions: demographic transformation, land transformation, industrial transformation, social transformation, ecological transformation, and digital transformation (
Table 1). The specific indicators are as follows:
Demographic Transformation: This includes three indicators: the proportion of non-agricultural employment (a1), reflecting the shift of rural labor to non-agricultural sectors; the proportion of labor force (a2), indicating the adequacy of labor resources; and the proportion of residents with high school education or above (a3), indicating the level of human capital in rural areas.
Land Transformation: This dimension emphasizes land use efficiency. The proportion of arable land (a4) reflects the share of arable land in the total land area, with a lower ratio indicating a more diversified land use structure. Land mobility (a5) shows the status of land market transactions and scale operations. Land productivity (a6) assesses the economic output per unit of land.
Industrial Transformation: This focuses on optimizing and enhancing the efficiency of rural industrial structures. Crop diversity (a7) indicates the shift from grain-based monoculture to a more diversified crop structure dominated by cash crops. The proportion of tertiary industry income (a8) reflects the development level and advancement of the rural industry structure. Agricultural labor productivity (a9) measures the output efficiency of labor input in production.
Social Transformation: This dimension reflects the development of basic rural services. The number of courier service points (a10) and the number of farmers’ markets (a11) indicate the development level of rural markets and services. Per capita investment in public facilities (a12) assesses the investment in living quality for rural residents.
Ecological Transformation: This emphasizes the integration of the ecological environment with rural economic development [
60]. Indicators include the proportion of pollution-free crop cultivation (a13) and village greening rate (a14), reflecting the quality of the rural ecological environment. Tourism income (a15) indicates the development potential of eco-tourism in rural areas.
Digital Transformation: This dimension represents the penetration and application of digital technology in rural transformation [
61,
62]. Indicators include the number of e-commerce entrepreneurs (a16), the proportion of households with cable TV (a17), and the proportion of households with internet access (a18), showcasing the digital infrastructure and degree of digital transformation in rural areas.
After establishing the measurement indicator system, the entropy method was used to assign weights to ensure objectivity and scientific accuracy. The weighted indicators were then aggregated to determine the level of rural transformation for each village.
3.2.2. Dependent Variable
The dependent variable in this study is the total annual personal income of farmers in 2022 (Income). This variable aims to analyze and quantify the impact of rural transformation on farmers’ incomes. Additionally, the income data is log-transformed. The reason for this approach is that income data often exhibit high variability and right-skewness, leading to heteroscedasticity, which can undermine the robustness and reliability of regression estimates. Logarithmic transformation compresses extreme values, making the data distribution more symmetric and reducing heteroscedasticity. By stabilizing variance, log transformation ensures more consistent and accurate analysis of the impact of rural transformation on income.
3.2.3. Mechanism Variables
Agricultural Value Chain Upgrading (Upgrade): This is a key indicator for measuring the progress of rural transformation and an important mechanism through which rural transformation promotes income growth for farmers. The rise and development of new agricultural business entities are significant features of the upgrading process. These new entities, such as family farms, farmer cooperatives, and agricultural enterprises, play crucial roles in resource aggregation, innovation, and technology application. Therefore, this study uses the natural logarithm of the number of new agricultural business entities in the village as a proxy variable for agricultural value chain upgrading.
Farmers’ Market Participation (Market): The degree of farmers’ market participation can be assessed by the diversity of sales channels they use. In highly market-oriented rural areas, farmers typically use multiple sales channels to sell their agricultural products. Accordingly, this study quantifies responses to the questionnaire item “What sales channels are you currently using to sell your agricultural products?” Farmers using a single sales channel are assigned a score of 1, while those using multiple channels receive a score corresponding to the number of different channels used.
Farmers’ Financial Accessibility (Access): This is measured based on the household’s investment and loan status. This study combines the total external investment of the household at the end of 2022 with the balance of loans from formal financial institutions to reflect the financial accessibility of farmers, and this combined value is log-transformed.
3.2.4. Control Variables
To capture the multifaceted factors influencing farmers’ incomes, this study introduces a series of control variables at the individual, household, and village levels, referencing existing research [
63,
64].
Individual-level variables include gender (Gender), age (Age), health status (Health), educational attainment (Edu), non-agricultural vocational training (Train), and agricultural technical training (Tech). These variables are selected to control for the potential impacts of personal capabilities, health status, and human capital on income.
Household-level variables consider the political background of the household (Status) and whether any family member holds a village cadre position (Position), aiming to assess the impact of social capital on farmers’ economic activities, whether positive or negative.
Village-level variables include village type (Center) and geographical characteristics (Geogra) to reflect the influence of geographical location, infrastructure, and natural resources on farmers’ incomes. The specific meanings and assignment details of these variables are presented in
Table 2.
3.3. Descriptive Statistics
Descriptive statistics for all variables are presented in
Table 3. The descriptive statistics for the core explanatory variable “RT” show a mean value of 0.2286 and a standard deviation of 0.1389, indicating that there is still significant room for improvement in the level of rural transformation across China, with considerable variability and imbalance. Regarding individual characteristics, the data for gender (Gender) indicate that the majority of the sample consists of male respondents. The age (Age) variable ranges from 10 to 93 years, with an average age of 57.24 years, reflecting the aging population in rural China. The relatively high average age likely highlights the prevalent trend of younger labor migrating to urban areas, which impacts rural labor supply, social welfare needs, and the talent pool necessary for rural transformation. The statistical analysis of other variables provides limited additional insights and is therefore not discussed in detail here.
3.4. Model Specification
Given that the target variable, farmers’ income, is continuous, a multiple regression model based on Ordinary Least Squares (OLS) is employed. The baseline model is specified as follows:
In Equation (1), i represents the individual farmer, and α0 is the intercept term, representing the logarithm of the average income of farmers in the absence of any explanatory variables. c is the estimated coefficient of the core explanatory variable “RT” and its impact on farmers’ income. Control denotes a series of control variables, including individual characteristics (such as gender, age, health status, and education level), household characteristics (such as whether there are party members or village cadres in the household), and village characteristics (such as village type and geographical features). ϵi is the random error term, encompassing all other factors affecting farmers’ income that are not captured by the model. The coefficient cRTi will reveal how farmers’ income changes with each unit increase in the level of rural transformation.
To address endogeneity issues arising from omitted variables, measurement errors, and reverse causality, this study uses two-stage least squares (2SLS) methods. The 2SLS approach specifically addresses endogeneity by using valid external instruments that are correlated with the endogenous explanatory variables but uncorrelated with the error term.
First Stage Regression: The endogenous variable (
RT) is regressed on the instrument
(Distance) and other exogenous variables:
where
Distancei represents the distance from the village to the county government.
Second Stage Regression: The predicted values from the first stage
are used in the second regression to estimate the impact on the dependent variable (
Income):
Furthermore, based on the theoretical analysis presented earlier, this study posits that the income-increasing effects of rural transformation may stem from the promotion of agricultural value chain upgrading, enhanced farmers’ market participation, and improved financial accessibility for farmers. Thus, the following mechanism verification model is specified:
In Equation (4), Mi represents the mechanism variables of interest in this study, namely agricultural value chain upgrading, farmers’ market participation, and farmers’ financial accessibility. The other symbols retain the same meanings as in Equation (1).
4. Results and Analysis
4.1. Evaluation of Rural Transformation Levels
This study uses the previously constructed indicator system and the entropy method to quantitatively assess the average level of rural transformation across the 15 sample provinces in China. The ranking of rural transformation levels from highest to lowest is as follows: Fujian, Hebei, Jiangsu, Chongqing, Sichuan, Shandong, Zhejiang, Jilin, Xinjiang, Yunnan, Anhui, Hubei, Heilongjiang, Hunan, and Henan. To present the results more intuitively, a combination of geographical distribution and bar charts is depicted in
Figure 2, facilitating a straightforward comparison between provinces and an analysis of spatial distribution characteristics.
The results in
Figure 3 show that Fujian, Hebei, and Jiangsu rank at the top, aligning well with the high levels of economic development and infrastructure in these regions. Specifically, these eastern coastal provinces generally have higher economic output and well-developed infrastructure, which contribute to their advanced rural transformation levels. This indicates that economic development and infrastructure construction are crucial drivers of rural transformation. In contrast, central provinces like Henan and Hunan, which are major agricultural regions, face more challenges in the rural transformation process due to their significant agricultural shares, leading to relatively slower transformation progress.
4.2. Baseline Regression
To examine the impact of rural transformation on farmers’ incomes, this study conducts an empirical analysis using the OLS method. The specific results are presented in
Table 4. Model (1) is a univariate regression model containing only the explanatory and dependent variables, while Models (2) to (4) progressively incorporate individual-level, household-level, and village-level control variables.
The results in
Table 4 indicate that rural transformation (RT) consistently has a significant positive impact on farmers’ income (Income) across all regression models, even as control variables are added incrementally. The coefficient for rural transformation decreases from 1.201 in Model (1) to 0.958 in Model (4), suggesting that for each unit increase in rural transformation, the log of farmers’ average income increases by at least 0.958 units, thereby validating Hypothesis H1. This underscores the importance of advancing rural transformation as a key strategy for increasing farmers’ incomes and highlights the broader economic and livelihood benefits of accelerating rural transformation.
Regarding control variables, their effects generally align with expectations. For individual characteristics, age (Age) shows a significant negative relationship with farmers’ income, indicating that the ability and likelihood of engaging in high-income activities decrease with age. Health status (Health) is positively correlated with farmers’ income, emphasizing the critical role of good health in income generation. Education level (Edu) also has a significant positive effect on income, underscoring the importance of human capital in enhancing farmers’ earnings. For household characteristics, the presence of party members in the household (Status) has a significant positive coefficient, suggesting that higher social capital can effectively boost household income. At the village level, the terrain (Geogra) being flat has a significant positive impact on farmers’ income, indicating the importance of favorable agricultural conditions in increasing income.
4.3. Endogeneity and Robustness
To address the endogeneity issue arising from the bidirectional causality between rural transformation and farmers’ income, this study employs the Two-Stage Least Squares (2SLS) method. We select the “distance from the village to the county government” (Distance) as the instrumental variable (IV) for rural transformation for the following reasons: firstly, this distance reflects the extent to which rural areas benefit from the spillover effects of urbanization, which is closely related to rural transformation; and secondly, the distance variable does not directly determine individual farmers’ income, thus meeting the exogeneity condition of the instrumental variable.
As shown in
Table 5, column (1) results indicate that the distance variable (Distance) is significantly negatively correlated with rural transformation (RT), suggesting that the farther a village is from the county center, the lower its level of rural transformation, highlighting the driving role of urbanization in rural transformation. The regression results in column (2) show that the coefficient of rural transformation on farmers’ income is 1.198 and is statistically significant at the 1% level. This indicates that, after addressing endogeneity bias, our core hypothesis H1 remains valid.
To verify the robustness of the results, we applied trimmed regression by trimming the top and bottom 1% and 5% of farmers’ income data to mitigate the distorting effects of extreme values and enhance the reliability of the estimates. As shown in columns (3) and (4) of
Table 5, the positive impact of rural transformation (RT) on farmers’ income remains significant, with coefficients of 0.956 (1–99% trimmed) and 0.867 (5–95% trimmed), consistent with the baseline regression results, thus confirming the robustness of the core hypothesis H1.
4.4. Mechanism Examination
In this section, we empirically test the mechanisms through which rural transformation promotes farmers’ income according to the method specified in Equation (2). As shown in column (1) of
Table 6, rural transformation has a significant positive impact on agricultural value chain upgrading (Upgrade), with a coefficient of 0.392. This indicates that for each unit increase in rural transformation, the degree of agricultural value chain upgrading increases by 0.392 units, validating the “rural transformation → agricultural value chain upgrading → farmers’ income growth” pathway mechanism. Secondly, as shown in column (2), rural transformation also has a significant positive impact on farmers’ market participation (Market), with a coefficient of 0.139. This suggests that the development of the digital economy alongside rural transformation has introduced new sales platforms and marketing models, enabling farmers to sell their products through more diversified channels, thereby significantly enhancing agricultural producers’ economic benefits. Additionally, the impact of rural transformation on increasing farmers’ financial accessibility (Access) has a coefficient of 0.263, indicating that during the rural transformation process, farmers’ financial accessibility has significantly improved, providing the necessary financial support for their production and livelihood activities, effectively promoting income growth.
In summary, rural transformation facilitates agricultural value chain upgrading, enhances farmers’ market participation, and improves financial accessibility, thereby effectively increasing farmers’ income. This validates our research hypothesis H2. By revealing the transmission mechanisms through which rural transformation promotes income growth, we unpack the “black box”, providing a deeper understanding of the intrinsic logic of how rural transformation impacts farmers’ income. This also offers insights for other countries facing rural decline and challenges in increasing farmers’ income.
4.5. Heterogeneous Effects of Different Rural Transformation Modes
Rural transformation is a multidimensional process involving demographic, land, industrial, social, ecological, and digital transitions, each of which may have distinct impacts on farmers’ incomes. To evaluate these differences, columns (1) to (6) of
Table 7 present independent regression analyses for each dimension of rural transformation, maintaining consistent model specifications and control variables to ensure comparability. This approach allows for a scientific assessment of the magnitude and statistical significance of the impact coefficients across different transformation modes, highlighting the varying effects of each dimension on farmers’ income.
As shown in
Table 7, the effects of different rural transformation modes on farmers’ income exhibit significant variability. Specifically, industrial and social transformations have the most pronounced effects on increasing farmers’ income, with coefficients of 1.613 and 1.369, respectively, both significant at the 1% level. This is because these transformations are directly related to employment and quality of life for farmers. Demographic transformation also has a relatively large impact, with a coefficient of 0.902, significant at the 1% level, highlighting the importance of improving the quality of agricultural labor and facilitating non-agricultural employment for income growth. In contrast, while digital transformation (coefficient 0.513, significant at the 10% level) has introduced new opportunities for farmers, its impact is still relatively limited, possibly due to the incomplete maturity of digital technology adoption in rural China. Ecological transformation and land transformation are not statistically significant, indicating that their positive effects have yet to materialize, which may require a longer-term perspective to evaluate their impact on farmers’ income.
Therefore, future directions for China’s rural transformation should focus on deepening demographic, industrial, and social transformations, enhancing farmers’ digital literacy to boost the economic benefits of digital transformation, and emphasizing ecological protection and sustainable development by establishing diverse mechanisms to realize the value of rural ecological products.
5. Discussion
This study highlights that rural transformation significantly influences farmers’ income in China, primarily through the mechanisms of upgrading agricultural value chains, enhancing market participation, and improving financial accessibility. Coastal regions exhibit higher levels of transformation due to better infrastructure and economic conditions, while inland provinces face slower progress due to their heavy reliance on agriculture.
Our research enhances the global discourse by incorporating empirical evidence from China, highlighting how the country addresses rural decline through tailored transformation strategies, complementing the measures observed in other countries [
27,
28,
29,
30]. Additionally, we broaden the dimensions of rural transformation to include ecological and digital aspects, which are often overlooked [
31,
32,
33,
34,
35]. This study successfully validates the distinct impacts of different transformation models, revealing the varied effectiveness of each approach and contributing to a deeper understanding of rural transformation’s multifaceted nature.
This study provides empirical evidence on the transmission mechanisms behind rural transformation, unpacking the “black box” of how transformation directly affects income. By revealing that value chain upgrades, market access, and financial inclusion are key pathways, our findings offer actionable insights for policymakers to refine existing rural development strategies.
While this study provides valuable insights, it is limited by its cross-sectional nature, which captures the impact of rural transformation at a single point in time. Future research should consider longitudinal data to assess the long-term effects and sustainability of different transformation modes. Moreover, our focus on China’s specific context may limit the generalizability of the findings to other countries with different socio-economic dynamics.
Future studies should explore the evolving role of digital and ecological transformations in rural income growth as these dimensions develop further. Comparative studies involving multiple countries could also provide deeper insights into how different transformation strategies perform under varied economic, cultural, and policy environments. Such research would enhance our understanding of rural transformation’s global applicability and offer more tailored recommendations for diverse contexts.