We find the effects of ISO 14001 on GSCM practices to be quite large. Facilities with ISO 14001 are about 40% are more likely to assess their suppliers’ environmental performance than facilities without ISO 14001 and 50% more likely to require that their suppliers undertake specific environmental practices. We also show that policies that encourage facilities to adopt EMS are indirectly related to the implementation of GSCM practices. Specifically, the availability of government-sponsored programs that encourage facilities to use EMS make it 7% more likely that facilities will also assess their suppliers’
environmental performance and make it 8% more likely that facilities will also require their suppliers to undertake specific environmental practices