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Table 3 Variable dependence on effort levels within contract types

From: Profit distribution and managers’ behaviour in vertical integrated medical delivery systems – an experimental economics study

Independent variable β SE Wald df P 95% CI
lower upper
The bidding distribution rate −0.01 0.01 0.62 1 0.43 −0.04 0.02
The improvement rate 0.13 0.03 20.24 1 <0.001 0.07 0.18
The subject type (Reference: undergraduates)
Postgraduates −1.50 0.24 37.85 1 <0.001 −1.97 − 1.02
Professionals −1.71 0.30 33.56 1 <0.001 −2.29 −1.13
Flexible contract (Reference: rigid contract) −0.32 0.22 2.18 1 0.14 −0.75 0.11
Good nature state (Reference: bad nature state) 0.80 0.22 12.76 1 <0.001 0.36 1.23
Round (Reference: first 3 rounds)
Among 4 rounds 0.14 0.21 0.45 1 0.50 −0.28 0.57
Final three rounds 0.40 0.23 2.97 1 0.09 −0.06 0.86