We use portfolio theory to quantify the efficiency of state-level sectoral patterns of production in the United States. On the basis of observed growth in sectoral value added output, we calculate for each state the efficient frontier for investments in the real economy, the efficient Sharpe...

This paper presents instrumental variables estimates of the effects of GDP per capita volatility on the size of government. We show that for a panel of 157 countries spanning more than half a century rainfall volatility has a significant positive effect on GDP per capita volatility in countries...

We use portfolio theory to quantify the efficiency of state-level sectoral patterns of production in the United States. On the basis of observed growth in sectoral value-added output, we calculate for each state the efficient frontier for investments in the real economy. We study how rapidly...