*1.2. Subjective Well-Being as a Policy Indicator*

Subjective well-being (SWB) is a theoretical construct developed in psychology [12–14] and economics [15–17] and has been the subject of many empirical studies. SWB is a multidimensional construct capturing basic human psychological needs, such as security, basic materials for a satisfactory life, health, successful social relationships, and freedom of choice and action. These human needs are also of interest to the conceptual model of ecosystem services [18], and we argue it is therefore important to monitor well-being when considering policies for forest ecosystems.

Forest SWB refers to a subjective well-being measure that assesses the respondent's relationship with forests. Previous studies regarding forest-specific SWB do not exist to the best of our knowledge, although the influence of nature on the general SWB has been studied by researchers. The number of studies investigating the relationships between nature, especially green spaces, and SWB is increasing. In the following sections, we argue that forest-related SWB can be a promising policy indicator.

### *1.3. SWB-Correlated Factors in the Literature*

In the reviewed two studies, the SWB-correlated factors in the literature were investigated. We organized factors associated with SWB into the following four categories in order to review previous studies: natural capital, built or manufactured capital, human capital, and social or cultural capital [19].
