The Impact of Adoption of Recommended Tea Plucking Interval on Tea Yields in Kenya

ABSTRACT

This study employs the endogenous switching regression model to examine the impact of the adoption of recommended tea plucking interval on tea yields among small-scale tea farmers in main tea-growing regions of Kenya. The study utilises cross-sectional farm household level data collected from a randomly selected sample of 413 households. Results support the notion that self-selection occurs and that estimates that do not consider selection-bias would be biased. Different determinants are found to be significant in explaining the tea yields for adopters and non-adopters. Thus, policy makers should consider these differing effects when designing development projects to increase tea yields.

KEYWORDS:

• Impact evaluation
• endogenous switching regression
• tea production
• recommended tea plucking interval