Three papers from this year’s American Economic Journal: Economic Policy deal with shocks that change people’s willingness to migrate to another location. As usual with these, I’m reporting on recent research results that readers might find interesting, but I’m not otherwise commenting.

Nian and Wang, “Go with the Politician”

In a study of crony capitalism in China: when a Chinese local leader is transferred from one prefecture to another, large firms in the old prefecture buy up 3x more land than average in the new prefecture at half the normal price. These land parcels show lower use efficiency afterwards. For the last 30 years, land sales make up 60% of local government revenue. There is no effect going the opposite direction (firms in the new prefecture buying land in the old one) and there is no effect when that politician subsequently moves to the next prefecture.

Moretti and Wilson, “Taxing Billionaires: Estate Taxes and the Geographical Location of the Ultra-Wealthy”

Following the Forbes 400 richest Americans from 1981-2017, it is clear that they are very likely to move away from states with estate taxes, particularly as they get older. They “find a sharp and economically large increase in estate tax revenues in the three years after a Forbes billionaire’s death.” Putting the two effects together, they find that it is still profitable for most states to adopt estate taxes despite some departures with a cost/benefit ratio of 0.69.

Liu, Shamdasani, and Taraz, “Climate Change and Labor Reallocation: Evidence from Six Decades of the Indian Census”

A panel fixed-effect model looking at how the climate changed decade by decade shows that fewer Indian workers move from rural to urban or ag to non-ag firms within a district, but no effect on movement between districts. They also show this comes from changes in demand patterns: higher temperatures lower rural yields and incomes, so they buy less from non-ag sectors, which reduces the demand for non-ag labor. These effects are larger in districts with fewer roads and/or less access to the formal banking sector.