Table 2 Descriptive statistics (N = 24,191)
Variables / Year | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Continuous Variables | |||||||||||
 Number of hospitals | 3,547 | 3,488 | 3,484 | 3,421 | 3,405 | 3,425 | 3,421 | ||||
 Operating expenses ($ mil) | 158.01 | 171.79 | 178.06 | 186.31 | 197.49 | 208.91 | 218.66 | ||||
 HHI | .0229 | .0237 | .0239 | .0244 | .0247 | .0246 | .0246 | ||||
 Size (#) | 179 | 181 | 181 | 182 | 182 | 182 | 182 | ||||
 Lobbying ($) | 65,647 | 62,064 | 58,959 | 71,001 | 70,433 | 65,757 | 91,484 | ||||
 Adjusted admissions (#) | 15,498 | 16,003 | 15,966 | 16,260 | 16,828 | 17,285 | 17,608 | ||||
Dichotomous variables | |||||||||||
 Adoption (#) | 16 (32%) | 18 (36%) | 20 (40%) | 22 (44%) | 22 (44%) | 22 (44%) | 23 (46%) | ||||
 Urban (#) | 529 (14.9%) | 508 (14.6%) | 492 (14.1%) | 465 (13.6%) | 467 (13.7%) | 462 (13.5%) | 460 (13.4%) | ||||
 Nonprofit (#) | 2,740 (77.2%) | 2,706 (77.6%) | 2,722 (78.1%) | 2,694 (78.7%) | 2,685 (78.9%) | 2,697 (78.7%) | 2,723 (79.6%) | ||||
 Teaching affiliation (#) | 877 (24.7%) | 876 (25.1%) | 883 (25.3%) | 896 (26.2%) | 927 (27.2%) | 924 (27.0%) | 915 (26.7%) | ||||