To address the safety concerns generated by truck crashes occurred in big cities, this paper analyzes the zip code tabulation area (ZCTA)-based truck crash frequency across four temporal intervals – morning (6:00–10:00), mid-day (10:00–15:00), afternoon (15:00–19:00), and night...

We develop an extended North-South model to analyse the US-China IPRs conflict and possible policies. In our model, innovation in the North (US), imitation in the South (China), and Foreign Direct Investment (FDI) are all endogenous. We predict that whether tighter IPRs benefit the US or China...