Land scale heterogeneity, collective action and soil erosion control: evidence from the Loess Plateau of China

This paper investigates the effect of land scale heterogeneity on participation by farmers in collective action and the level of erosion control, and its mechanism of action, using survey data from 45 villages and 1,149 households in a typical erosion area of the Yellow River basin. The results show that there is a non-linear, U-shaped relationship between land size heterogeneity and farmers’ participation in collective action and the level of erosion control, respectively, and that collective action plays a mediating role in the U-shaped relationship between land size heterogeneity and level of erosion control. This implies that maintaining a homogeneous distribution of land among households within the village collectivity and a large disparity in land allocation both promote participation in collective action and thus improve the level of erosion control. Using an endogenous regression transformation model to deal with endogeneity and robustness tests, the findings remain robust. In the mechanism analysis section, variables for the level of trust and co-ordination of interests are introduced and a non-linear, U-shaped relationship is found between land size heterogeneity through the effect of both on collective action. This suggests that the allocation of land resources as described above can co-ordinate the level of trust and the direction of interests among farmers, leading to conditions for co-operation and thus facilitating farmers’ participation in collective action.