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Table 4 Decomposition of changes in retention rates over time

From: Is there a crisis in nursing retention in New South Wales?

  RNs Enrolled
  1999 1994 Differ. 1999 1994 Differ.
Sample Size 45084 41386   9374 9095  
Observed mean retention probability 0.849 0.839 0.010 0.804 0.771 0.033
Predicted mean retention probability 0.849 0.839 0.010 0.804 0.771 0.033
Probability at mean characteristics: 0.857 0.848 0.009 0.813 0.781 0.031
Overall decomposition:       
   Contribution from differences in coefficients 0.006    0.030
   Contribution from differences in mean characteristics 0.004    0.001
Total    0.009    0.031
Contribution from individual characteristics:     
   Personal characteristics (age, citizenship, sex) 0.002    0.012
   Human capital (post basic qualification, years registered) 0.005    0.005
   Location of job (region, unemployment rates) -0.003    -0.003
   Hours of work (hours in main job, second job as nurse) 0.003    -0.001
   Job characteristics (classification, field, activity, premises) -0.004    -0.012
Total    0.004    0.001
Characteristics whose coefficients changed significantly between 1994 and 1999:
RNs: sex, hours in main job, job classification, field and activity.
Enrolled: post-basic qualification and field
  1. Notes: Separate probits are estimated for 1999 and 1994 and for RNs and enrolled nurses. In both years the same explanatory variables are used and differences in the predicted retention probability is decomposed using a first order Taylor-series expansion.