Norman Loayza

Klaus Schmidt-Hebbel

Luis Serven

The authors investigate the policy and non-policy factors behind saving disparities, using a large panel data set and an encompassing approach including several relevant determinants of private saving. They extend the literature in several dimensions, by: 1) Using the largest data set on aggregate saving assembled to date. 2) Using panel instrumental variable techniques to correct for endogeneity and heterogeneity. 3) Performing robustness checks on changes in estimation procedures, data samples, and model specification. Their main empirical findings: a) Private saving rates show considerable inertia (are highly serially correlated even after controlling for other relevant factors). b) Private sector rates rise with the level and growth rate of real per capita income. So policies that spur development are in indirect but effective way to raise private saving rates. c) Predictions of the life-cycle hypothesis are supported in that dependency ratios generally have a negative effect on private saving rates. d) The precautionary motive for saving is supported by the finding that inflation - conventionally taken as a summary measure of macroeconomic volatility - has a positive impact on private saving, holding other facts constant. e) Fiscal policy is a moderately effective tool for raising national saving. F) the direct effect of financial liberalization are largely detrimental to private saving rates. Greater availability of credit reduces the private saving rate; financial depth and higher real interest rates do not increase saving.

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