“…For each year from 2000 to 2010 we obtained the following facility-level covariates from OSCAR, which had potential associations with nursing home operations and staffing inputs:[10,12,14,16,20] number of beds, affiliation with a chain (yes or no), ownership type (for-profit, nonprofit, or government owned), occupancy rate, percentage of Medicare residents, percentage of Medicaid residents, and location in a rural county (yes or no). We obtained data on the following additional covariates from the LTCfocus facility files, the percentage of female residents, average age of residents, and a facility-level case-mix index that was derived from the Resource Utilization Group (RUG) III classification[28] of all residents in the facility on the first Thursday of April in each year.…”