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Tenure Security, Investment and Productivity in Gambian Agriculture: A Generalized Probit Analysis
Author(s) -
Hayes Joseph,
Roth Michael,
Zepeda Lydia
Publication year - 1997
Publication title -
american journal of agricultural economics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.949
H-Index - 111
eISSN - 1467-8276
pISSN - 0002-9092
DOI - 10.2307/1244136
Subject(s) - productivity , investment (military) , probit model , simultaneous equations model , economics , probit , econometrics , multivariate probit model , estimation , agriculture , generalized method of moments , simultaneous equations , ordered probit , microeconomics , mathematics , macroeconomics , panel data , geography , management , archaeology , politics , political science , law , mathematical analysis , differential equation
The determinants of investment, input use, and productivity are investigated under customary tenure in peri‐urban areas of the Gambia. A structural model is specified to investigate the role of tenure security on farm investments and input use and thereby on yield. Testing of the structural form hypotheses requires simultaneous equation estimation. Containing both continuous and discrete endogenous variables, the model is estimated as a feasible generalized least squares Amemiya's generalized probit. Some of the positive relationships hypothesized between tenure security, investment, and yields are corroborated. In particular, tenure security is found to enhance long‐term investments, which in turn enhance yields.