Fig. 1

Parallel Trend. Note: On the horizontal axis, 1 represents the third quarter of 2014, − 1 represents the last quarter of 2013, and so on. (a-h) in figure 1 depict the mean values of inpatient total expenditure per inpatient visit, inpatient diagnostic test expenditure per inpatient visit, inpatient drug expenditure per inpatient visit, inpatient physician service expenditure per inpatient visit, the proportion of diagnostic tests expenditure per inpatient visit, the proportion of drug expenditure per inpatient visit, the gender of per inpatient visit, the age of per inpatient visit, respectively