I have been searching for papers that conduct lab experiments simulating a labour market, that means for a minimum there are both participants taking the role of firms, and participants taking the role of job searchers, and these two parties form work contracts. The focus should be on the contract formation, not the principal agent / effort provision part. The more macro the setup the better. The only references I found are Falk, Fehr, and Zehnder (2006), and (although less relevant than the first) also Brandts and Charness (2004). Both very interesting papers. If anybody knows further similar experimental setups (especially more recent ones), it would be really helpful.