Page 278 of articles about markets-economics
European Union: study and economic analysis of the costs and benefits of ending surgical castration of pigs
Effects of reduced nocturnal temperature on pig performance and energy consumption in swine nursery rooms

The cost of PRRS to pork producers
The total cost of productivity losses to US producers is estimated at US$664 million annually but productivity losses are shifting from the growing pig herd to the sow herd.