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Last week, lawmakers in Washington state reviewed a proposed bill that its sponsor, Rep. Liz Berry, described as a "real joint effort" between Uber, Lyft and the Teamsters union.

Introduced just days earlier, the bill would give drivers access to some benefits, including paid sick leave. It also would task ride-share companies with responsibilities related to driver permits, background checks and insurance, and establish a "driver resource center" that drivers can use to resolve disputes.