and diversified in their service offerings and are less likely to do so with increasing age and greater geographical scope …

pollutants does the service sector account for even four percent of total emissions; for three of the five services account for … less than one percent. Second, those service industries that do pollute are the least likely to be traded internationally … services are not traded. Even if we limit attention to the services that are traded across borders, the service industries most …

differences across countries are larger in manufacturing than in services. The service sector comprises heterogeneous categories …. We document that many disaggregated service categories–such as transportation, communication, and finance–feature a …