The Effects of Social Security: Evidence for Seventeen Countries

This paper estimates an Euler equation for per capita consumption to investigate whether social security increases consumption ceteris paribus in seventeen countries. Following the seminal work of Martin Feldstein, the literature has estimated consumption functions to address this question. Unfortunately, consumption functions confound structural and expectational parameters, making their interpretation problematical. Furthermore, if their variables are difference-stationary, least squares may produce inconsistent parameter estimates and must virtually always produce inconsistent standard errors for the estimated parameters. By contrast, under reasonable assumptions, generalized method of moments consistently estimates the parameters and standard errors of Euler equations. Moreover, the parameters are more readily interpretable. The paper finds strong evidence that social security increases consumption ceteris paribus. Furthermore, the coefficient estimates imply large negative effects either on the levels of disposable income and consumption along their balanced growth paths or on their growth rates. JEL Codes: E21, E62, H31