3.1. Characteristics of Green Technology Innovation Performance
A green technology innovation system of manufacturing enterprises under multi-agent cooperation is a complex system, which mainly includes manufacturing enterprises and multi-agent (universities, research institutions, government, intermediaries, upstream and downstream enterprises, consumers, etc.) [
34,
35,
36,
37,
38,
39,
40]. Among them, manufacturing enterprises are the initiator and core subject of the system and determine the effect of the green technology innovation of manufacturing enterprises under multi-agent cooperation. The system is supported by many elements in order to function effectively. These elements include resource supply, capital supply, technical service, product demand, cooperation policy, and policy incentive [
18,
19,
20,
21]. At the same time, there are many factors and complex structures that affect the performance of the green technology innovation of manufacturing enterprises under multi-agent cooperation. Only by constructing an evaluation index system from multiple perspectives and levels can the green technology innovation performance of manufacturing enterprises under multi-agent cooperation be fully reflected.
From the perspective of formation, the complete green technology innovation performance should include two parts: The green technology innovation output performance and the green innovation process performance of manufacturing enterprises under multi-agent cooperation. From the multi-agent perspective, green technology innovation performance includes the leading performance of manufacturing enterprises and the multi-agent cooperation performance. When evaluating the green technology innovation performance of manufacturing enterprises under multi-agent cooperation, the direct and indirect performances brought about by multi-agent cooperation should be emphasized. The reciprocal cooperative relationship between manufacturing enterprises and multi-agent collaboration is an important index to evaluate the performance of the green technology innovation of manufacturing enterprises under multi-agent cooperation. Based on the above analysis, a framework of performance formation of manufacturing enterprises under multi-agent cooperation is shown in
Figure 2.
Figure 2 fully reflects the green technology innovation performance of manufacturing enterprises under multi-agent cooperation. The performance formation framework lays a theoretical foundation for the establishment of an evaluation index system of green technology innovation performance for manufacturing enterprises under multi-agent cooperation.
3.2. Design Principles for Evaluating Indicators
In order to accurately reflect performance, the index system should be constructed from multiple perspectives. The rationality and objectivity of the performance results should be guaranteed by following the principles outlined below.
(1) Scientific principle. The scientific principle means that the whole process of green technology innovation should be scientifically presented from multiple perspectives. In essence, it reflects the characteristics of the green technology innovation of manufacturing enterprises under multi-agent cooperation.
(2) Practicality principle. The practicability principle is shown in the following two aspects: Data collection and implemented evaluation. In the initial selection process of evaluation indicators, it is important to take into account the availability of data. In addition to ensuring the availability of data, it is also necessary to ensure the consistency of the statistical data caliber so that the evaluation can be operated and can be more practical.
(3) Combining the principles of comprehensiveness and conciseness. It is necessary to undertake comprehensive consideration when constructing an evaluation index system. The selection of indicators should cover all aspects of the green technology innovation of manufacturing enterprises under multi-agent cooperation. In addition, simple indicators with strong representativeness for evaluation should be chosen, and indicators with similar meanings or even duplications should be avoided.
(4) Comparability principle. In order to make sure the evaluation is representative, it is necessary to evaluate the performance of the green technology innovation of many manufacturing enterprises under multi-agent cooperation. This means that comparisons between manufacturing enterprises are essential. This principle should be fully taken into account in the construction of an evaluation index system.
(5) Propose principles for countermeasures. The purpose of green technology innovation performance evaluation is to find any issues in the process of the green technology innovation of manufacturing enterprises under multi-agent cooperation. According to the evaluation results, many countermeasures are put forward to improve said green technology performance. The selection of evaluation indicators should also be considered to help the government to develop green innovation policies.
(6) Principle of green development. Green development refers to the shift to cleaner and more efficient technologies, as close as possible to zero emissions or closed process methods, and to as low as possible consumption of energy and other natural resources. The performance evaluation of the green technology innovation of manufacturing enterprises under multi-agent cooperation should be considered in favor of the principle of enterprise green development.
3.3. Predictive Test Indicators
The aspects of green performance evaluation index system, index system of multi-agent cooperation evaluation, and the use of different evaluation methods were reviewed to lay a foundation for the construction of the index system. In addition, Tsai and Liao (2014) and Vukšić (2015) proposed an evaluation framework for open innovation [
63,
64]. In the research of Kobarg et al. (2018), objective indicators were used to measure the cooperation performance [
65]. Szucs (2018) emphasized the use of subjective indicators that focus on evaluating the cognitive outcomes of participants [
66]. Biedenbach et al. (2018) proposed a conceptual evaluation model of industry–university–research cooperation performance [
67]. Witte et al. (2018) pointed to the importance of factors such as capital, collaboration, and proximity [
68]. Li et al. (2018) constructed the input-output-transformation process model of collaborative innovation [
69]. The above-mentioned literature emphasizes the importance of enterprise-led performance and multi-agent cooperation performance, most of which focus on the innovation input, the innovation output, the economic output of innovation, and the social effects of innovation.
The connotation of performance is mainly embodied in the three aspects of effect, efficiency, and benefit. The effect is the degree to which the goal is achieved, which is the appearance of the performance; the efficiency is the relationship between input and output; and the benefit refers to the economic, social, and environmental benefits that the final result brings to the organization or individual [
27,
28,
29,
30,
31,
32,
33]. However, scholars have not yet reached a consensus regarding the definition of innovation performance, which can be summarized from the following four aspects [
62,
63,
64,
65,
66,
67,
68]. First, innovation performance is the increase of innovation output; second, it includes the whole process from the generation of new ideas to the introduction of inventions to the market; third, it is the efficiency of innovation input into output; fourth, it is determined by innovation output and innovation efficiency, both of which are equally important for innovation performance. Based on the above analysis, this study believes that innovation performance refers to the innovation achievements made by the innovation subject through a series of innovative activities, which can be reflected by technology output, economic output, and social effects.
The green technology produced by manufacturing enterprises and university and research institutions, as well as the application of customer-oriented technology, mainly reflect the green technology produced by green technology innovation. The economic output of the green technology innovation of manufacturing enterprises under multi-agent cooperation is a measure of the innovative benefits gained by these manufacturing enterprises through cooperative application of green technology practices with research institutions and active purchase of green products by consumers. These benefits also include government incentives and subsidies based on emissions reductions. The social effect of the green technology innovation of manufacturing enterprises under multi-agent cooperation include macroeconomic, green society, resource, and environmental effects brought by green technology innovation [
23,
24,
25,
26]. The macroeconomic effect is reflected in the radiation effect led by enterprises; the green society effect manifests itself in the public green environmental protection consumption consciousness and so on; the environmental effect is mainly reflected in the aspects of resource saving and waste reduction. Therefore, an evaluation index system of the green technology innovation performance of manufacturing enterprises under multi-agent cooperation can mainly be established from three perspectives: The technology output, the economic output, and the social effects of green technology innovation. The initial index system constructed is shown in
Table 1.
There are many evaluation indicators in an initial evaluation index system, and the contribution of each index to green technology innovation and its own index quality are also different. Therefore, we constructed a comprehensive index system at the beginning of the study, and finally determined the formal indicators of this study through a series of tests and surveys. In
Table 1, 32 indicators are summarized from the aspects of technology output, economic output, and social effects of green technology innovation. After determining the primary indicators, we adopted the expert scoring method, and divided the 32 indicators into very unimportant, relatively insignificant, unimportant, general, important, relatively important, and very important degrees according to the numerical order of 1 to 7. We asked four experts who have been studying the green technology innovation of manufacturing enterprises for a long time and six managers in charge of the green technology innovation projects of their manufacturing enterprise to jointly score the 32 indicators. After the first expert evaluation, the new evaluation form was returned to the experts for the second evaluation. After several rounds of comprehensive feedback, the final results tended to be consistent. We excluded the indicators with a mean score less than 5 through expert scoring. In the primary indicators, we excluded the sales revenue of green new products in the economic output of green technology innovation, and the customer satisfaction degree of green products in the social effect of green technology innovation. It should be noted that on a 7-point Likert scale, the number 1 is very unimportant and the number 7 is very important. The number of evaluation experts, different industries, and other factors may lead to some limitations of the evaluation results. Therefore, indicators greater than or equal to the value of 5 were selected first.
3.4. Formal Test Indicators
On the basis of indicator screening, we divided the questionnaire into two parts. The first part collected the basic information of the manufacturing enterprises in order to understand the basics such as company information (e.g., the industry, time of establishment, assets, level of profitability, etc.), company nature, and personnel composition. The second comprised the evaluation index system of the green technology innovation performance of manufacturing enterprises under multi-agent cooperation, focusing on the investigation of the green technology innovation projects under multi-agent cooperation led by manufacturing enterprises, thus requiring a comprehensive consideration of all green technology innovation projects. In order to obtain the research data, we chose technical and managerial personnel related to the green technology innovation projects as the research objects.
In order to ensure the validity and operability of the questionnaire, cities with certain social networks (such as Harbin, Daqing, Beijing, Shijiazhuang, Zhenjiang, etc.) in northeast China, north China, and the eastern coastal areas were selected as the research areas. We chose manufacturing enterprises with high demand for green technology innovation as the research objects. In order to ensure data quality from the source, the indicators in the relevant literature and the measurement indicators of major scholars were used to develop a pre-survey questionnaire. We distributed 50 questionnaires to MBA and EMBA students of Harbin Engineering University. The questionnaire was revised and adjusted accordingly. After the adjustment, a total of 400 questionnaires were issued, and 229 questionnaires were finally recovered—a recovery rate of 57.25%. After eliminating incomplete data and obviously wrong questionnaires, 188 valid questionnaires were finally obtained. The effective rate of the questionnaire was 82.10%, which basically met the requirements of index analysis. Technical personnel accounted for 33.25%; technical managers for 45.58%; middle and senior managers for 21.17%; and 84.14% of the total respondents had a bachelor’s degree or above.
In order to avoid any bias effects, homologous method bias and non-responder bias tests should be performed on the study data. The Harman single factor analysis method was used to test the deviation of the homologous method. The results of the exploratory factor analysis showed that the load of the first principal component without rotation was 17.96. There was no single factor that could explain most of the variation factors, and the homologous method bias did not have a significant effect. In terms of the non-responders’ deviation, the first 1/3 and the last 1/3 of the samples were selected for the t-test according to the return time of the questionnaire. The test results showed that there was no significant difference between more than 90% of the observed variables; thus, the deviation of non-responders did not have a significant impact. The Harman single factor analysis test and the t-test were implemented by using SPSS20.0 soft.
(1) Correlation analysis among indicators. After establishing an evaluation index system, it is necessary to investigate the correlation among these indicators. If two indicators are correlated, then these two indicators represent the same or similar content. Thus, one of the indicators should be eliminated to simplify the index system. Correlation analysis among indicators can be implemented by using SPSS20.0 soft and MATLAB soft. The correlation test results are shown in
Table 2,
Table 3 and
Table 4.
- 1)
As for the correlation analysis of the technology output index of green technology innovation, the correlation between the level of new green products and the proportion of national and provincial brand green products is 0.713, higher than 0.7. The number/level of new green products is a comprehensive reflection of green products, while the number of national and provincial famous green products is only a part of the comprehensive response. Therefore, only the number/level of new green products was selected.
- 2)
As for the correlation analysis of the economic output index of green technology innovation, among the 10 indicators excluded, the growth rate index of the sales revenue of green products is correlated with the index of return on investment of green innovation projects; the correlation is 0.722, higher than 0.7. The return on investment indicators for green innovation projects can be used to reflect profit and revenue indicators. Therefore, the green product sales revenue growth rate index was excluded from the economic output index of green technology innovation.
- 3)
As for the correlation analysis of the social effect index of green technology innovation, the social effect index of green technology innovation reflects the effect of green technology innovation from different aspects. There is no high correlation among the indicators.
(2) Exploratory factor analysis of a single index. In order to avoid the influence of excessive random error on the quality of indicators, it is necessary to evaluate the quality of said indicators. Generally speaking, reliability and validity tests are used to evaluate the rationality and reliability of index selection. Therefore, Cronbach’s alpha coefficient was used to test the reliability and validity of our indicators in order to ensure the measurement quality, the results for which were obtained by using SPSS20.0 soft.
Reliability is defined as the ratio of the true variance to the total variance of a test score, where represents the reliability of the measurement. At the same time, since , the reliability can also be expressed as . Cronbach’s alpha is an important measure of reliability. On the basis of correlation analysis, SPSS20.0 software was used for exploratory factor analysis. The results of the software analysis show that the Cronbach probability values of the technology output, the economic output, and the social effects of green technology innovation are 0.918, 0.896, and 0.870, respectively. The estimates of Cronbach of all kinds are greater than 0.75, indicating that the classification of the evaluation index system of the green technology innovation performance of manufacturing enterprises under multi-agent cooperation is reasonable. Moreover, most of the factor loads are higher than 0.7, and the variate interpretation variance is more than 70%. This suggests that the indicators can comprehensively reflect all aspects of green technology innovation performance.
A validity test is used to analyze the validity of a questionnaire’s measurement results. The purpose of this test is to determine whether the measurement results of the questionnaire reflect the objective reality it should reflect. To be specific, the validity test must be based on the specific purpose of the function and scope of application, as well as the different aspects of the collection of information. The commonly used validity tests include content validity, structure validity, difficulty validity, and criterion validity. We should judge the content validity, structure validity, and criterion validity of the questionnaire, which can be combined into a single concept of construct validity. Construct is a concept constructed by researchers according to research needs. Construct validity verifies the measurement of a concept by examining the measurement results of the concept. The scale has good construct validity if the score of the subject can effectively explain its psychological characteristics. In the process of constructing the scale, we established the construct validity of the index system. Therefore, this questionnaire is valid.
(3) Formal evaluation index system. Correlation analysis and exploratory factor analysis were conducted in order to obtain the final evaluation index system of the green technology innovation performance of manufacturing enterprises under multi-agent cooperation, as shown in
Table 5. In the final system, the technology input of green technology innovation contains eight indicators, the economic output of green technology innovation contains nine indicators, and the social effects of green technology innovation contains nine indicators. Each dimension contains both quantitative and qualitative indicators. These three aspects not only reflect the balance between short-term and long-term goals, but also the effective combination between financial and non-financial indicators. The final system helps to fully reflect the direct performance and indirect performance, innovation output performance and innovation process performance, and enterprise-led performance and multi-agent cooperation performance. The formal evaluation index system in this study was used to truly evaluate the performance of the green technology innovation of manufacturing enterprises under multi-agent cooperation.