This paper examines the long-run relationship between income and urban air pollution using a joint distribution dynamics approach. This approach enables to estimate the transition process and long-run distribution and to examine the mechanisms behind the evolution process. The approach is...

Importing is an important method to connect the domestic market with international market. By importing energy resources to replace parts of domestic production, a country’s energy pressure has been alleviated to a certain extent, but does importing really improve a country’s energy...