{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/126982"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/126982","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Labor supply and accounting firm mergers","abstract":"In this paper, I study how regulation-induced accounting labor supply shocks affect the audit market. Using a novel dataset that includes both large and small accounting firms, I identify labor supply shocks using the 150-Hour Rule and the Mobility Provision and investigate the resulting incidence of mergers and acquisitions (M&A). I find that a reduction in labor supply increases accounting firms' M&A activity and leads to a higher audit market concentration. 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