Do Farmer-Producer Organizations increase smallholder incomes? An econometric evaluation of carrot farmers and market channel innovations in India

Abstract Background : Farmer-Producer Organizations (FPOs) have emerged as an important institutional mechanism for improving the market participation and income of smallholder farmers. However, empirical evidence on their causal impact remains limited due to potential self-selection into membership. This study evaluates the effect of FPO participation on the farm income of smallholder carrot producers in the Nilgiris district of Tamil Nadu, India. Methods : Primary data were collected from 480 carrot farmers, comprising 240 FPO members and 240 non-members, using a stratified random sampling technique. The impact of FPO membership on annual farm income was estimated using ordinary least squares (OLS) and instrumental variable (IV) regression models. To address potential endogeneity arising from self-selection, distance to the nearest FPO was used as an IV. Instrument validity was assessed using first-stage diagnostics and the Durbin–Wu–Hausman (DWH) specification test. In addition, price spread analysis was conducted to compare the efficiency of alternative marketing channels. Results : The OLS estimates indicate that FPO participation increases annual farm income by approximately ₹41,986 per household, whereas the preferred IV estimates show a substantially larger causal effect of ₹108,764 per household, equivalent to an increase of approximately 24.4% relative to the sample mean annual income. The first-stage F-statistic (23.94) confirms the strength of the instrument, while the DWH test indicates that IV estimation is preferred over OLS. Farm size, education, and market price positively influence farm income, whereas input cost has a significant negative effect. Price spread analysis further demonstrates that FPO-linked marketing channels improve producers’ share in the consumer’s rupee by reducing intermediary margins and enhancing marketing efficiency. Conclusions : The findings demonstrate that FPO participation significantly enhances the income of smallholder carrot farmers through improved market integration and collective marketing. Strengthening FPO infrastructure, governance, market linkages, and digital marketing platforms can further improve their effectiveness and contribute to inclusive agricultural commercialization and sustainable rural development.