Source: Robert H. Frank, Ben S. Bernanke, Kate Antonovics, and Ori Heffetz, Principles of Economics: A Streamlined Approach, 4th ed. (McGraw Hill, 2019). Page numbers below refer to the printed book pages. The textbook explains economic concepts; it does not provide Navy retention rates or current pay.
| Textbook reading | Application to this project |
|---|---|
| Chapter 1, pp. 5 and 8: opportunity cost, implicit cost, and decisions at the margin | Compare the best feasible civilian alternative with future Navy service at the next agreement decision. Previously spent training funds and already earned benefits do not change that choice. |
| Chapter 3, pp. 73–80: elasticity; Chapter 5, p. 124: explicit and implicit costs | A financial gap can create an incentive to leave, but its size does not tell us how many physicians will leave. Retention responsiveness needs observed behavior. The textbook’s price elasticity of demand is an analogy, not an estimated Navy retention elasticity. |
| Chapter 9, p. 226: externalities; Chapter 11, p. 278: trade | Pacific readiness could create benefits beyond an individual physician, but the lab does not measure a third-party effect. Mission, training, and family time are job attributes, not automatically externalities. Trade concepts do not supply a salary or retention estimate here. |
| Chapter 13, p. 324: deflating nominal amounts; Chapter 15, pp. 376–385: labor demand and supply | Hold wage paths in constant 2026 dollars and apply a real discount rate. Civilian offers and Navy pay shape the choice; labor-market curves explain incentives but do not establish a local supply response from one pay-gap observation. |
| Chapter 16, pp. 407–414: saving, retirement consumption, and real interest | Compare pension and TSP value as future financial compensation. Discount future payments to the decision date, and count only the value that differs between staying and leaving. Test other real discount rates because distant pension payments are sensitive to the assumption. |
| Chapters 19–21, pp. 507–612: monetary policy, aggregate demand, and exchange rates | Useful macroeconomic background, but none directly identifies a Navy primary-care pay gap or a retention effect. Do not add an exchange-rate or monetary-policy mechanism to the paper without a specific causal link and data. |
The financial opportunity cost of staying is the present value of feasible civilian compensation and benefits, less civilian costs, minus the present value of incremental Navy compensation and benefits over the same horizon. A positive number is a civilian financial advantage. A physician might still prefer Navy service because of personally valued nonfinancial job attributes. The lab’s “nonfinancial value required” is the value that would close that modeled financial difference; it is a threshold, not an observed preference or a bonus recommendation.
For any additional retention measure, compare its marginal expected benefit (additional physicians who actually remain, and any measured staffing/readiness benefit) with its marginal cost (new fiscal spending and opportunity cost of funds). A message about an opportunity has value only if it changes awareness of something real and accessible. A new assignment or clinical option must be evaluated as an actual change in the job bundle. Neither the textbook nor the lab identifies a causal retention effect.