{"has_more":true,"total_items":6,"items":[{"vg_id":0,"journal":"The establishment-level data is drawn from the U.S. Census","title":"Bureau's Longitudinal Business Database (LBD), a near-universe of establishments operating with positive employment in the United States, from 1975-2015 (for this project I have access to data starting from 1985). In the LBD, an establishment is defined as a specific physical location where business occurs. The LBD contains information on payroll, employment, industry, and location. In addition to establishment-level identifiers, the LBD contains enterprise-level identifiers"},{"vg_id":0,"journal":"B.1.2 LBD Variable Definitions firmid: The enterprise-level identifier that identifies the ultimate ownership of the establishment","title":"While the variable name is firmid, this is distinct to the firm-level identifier that is available in the LEHD, which is the EIN. Therefore, throughout the paper, I refer to the firmid available in the LBD as the enterprise ID. lbdnum: The establishment-level identifier that indicates a single physical location. The identifier is time-invariant and does not change due to changes in ownership of the establishment. Employment: Establishment-level employment as of March 12 th"},{"vg_id":0,"published_date":1997,"journal":"Industry: Unless otherwise stated, industry is defined by 4-digit North American Industry Classification Systems (NAICS) codes","title":"Census switched from using Standard Industrial Classification (SIC) to NAICS. While most of the analysis in the paper does not require industrial classification pre-1997 (I study mergers 1999-2009), the analysis that does require pre-1997 industrial classification uses time-consistent NAICS"},{"vg_id":0,"journal":"Tradable establishments are listed as belonging to the following NAICS two-digit codes: 11, 21, 31, 32, 33 and 55. 11 is agriculture, forestry and fishing, 21 is mining, quarrying and oil and gas extraction, 31-33 are manufacturing and 55 is management of companies and enterprises","authors":[{"author_name":" Tradable"}]}]}