Alabama’s crackdown on illegal immigrants, widely seen as the toughest in the United States, could cost the state’s economy up to $10.8 billion, according to a new study.

The Alabama law, passed in June, requires police to detain people they suspect of being in the United States illegally if they cannot produce proper documentation when stopped for any reason, among other measures.

A cost-benefit analysis released this week by University of Alabama economist Samuel Addy estimated up to 80,000 jobs could be vacated by illegal immigrants fleeing the crackdown, costing Alabama’s economy up to $10.8 billion.