This paper addresses the question why investment rates differ so marke
dly across countries. In the paper a model is laid out explaining why
governments in unstable and polarized societies may not have sufficien
t incentives to undertake legal reform so as to fully protect property
rights, and how this may hold back private investment. The model yiel
ds testable predictions regarding the link from political instability
to the quality of property rights, as well as the link from property r
ights to investment. These predictions hold up when confronted with cr
oss-country data for around 100 countries. In particular once I contro
l for the quality of property rights, the different measures of politi
cal instability and polarization employed have no direct effect on pri
vate investment. Thus, a possible link between political instability a
nd investment is identified. Extensive sensitivity analyses show that
the empirical results are robust to an ample of prospective statistica
l problems. (C) 1998 Elsevier Science B.V. All rights reserved.