Digital platforms are increasingly the subject of regulatory scrutiny. In comparison to multiple competitors, a single platform may increase consumer welfare if network effects are large or may decrease welfare due to higher prices or reduction in platform variety. We study the net effect of...

The history of animal trade -- Trade policies for animal products -- Trade wars, sanctions and discrimination -- Trade in meat -- Trade in some key animal products: dairy, wool and fur -- Trade in live farm animals -- Disease transmission and biodiversity loss through the trade in farm animals...