Inequality and Growth: the Role of Democracy

In the Alesina and Rodrik (1994) study on the impact of inequality on growth, why did they include a dummy for democracies in their empirical estimation? In other words, why did they want to study whether the impact would be different for democracies vis-a-vis non-democracies?

• Welcome, I changed the title and added a ungated version of the paper. – emeryville Apr 6 at 15:41

in a democracy (where the median voter theorem'' applies) the rate of taxation is higher and the rate of growth lower, the more unequal is the distribution of wealth.