We show a causal impact of immigration on innovation and dynamism in US counties. To identify the causal impact of immigration, we use 130 years of detailed data on migrations from foreign countries to US counties to isolate quasi-random variation in the ancestry composition of US counties that...

After more than three decades of high growth that was based on an exploration of its low-wage advantage and a relatively favorable demographic pattern in combination with market-oriented reforms and openness to the world economy, China is at a crossroad with a much higher wage and a shrinking...