13.6 One physician is paid S100 per visit. Another is paid $2,500 per week plus $100 per session in excess of 20 ses- sions per week. A third is paid S2,000 per week plus $100 per session in excess of 20 sessions per week. The third physician is also paid a weekly bonus of Ss00 for being in the fop quartile for management of common chronic dis- eases, appropriate antibiotic use, preventive counseling, screening tests, and appropriate prescribing in elderly pa- tients. How do the physicians' incentives compare?