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. 2016 Feb 23;127(600):445–494. doi: 10.1111/ecoj.12282

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© 2015 The Authors. The Economic Journal published by John Wiley & Sons Ltd on behalf of Royal Economic Society

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Estimates of the Average Marginal Effects of Distance

Notes. Plot of ${(T)}^{- 1} \sum_{a} \sum_{j \in C_{a}} {\hat{P}}_{a j} [f (d_{a j}, {\hat{β}}_{d}), \cdot] {1 - {\hat{P}}_{a j} [f (d_{a j}, {\hat{β}}_{d}), \cdot]} \partial f (d_{a j}, {\hat{β}}_{d}) / \partial d_{a h}$ where ${\hat{P}}_{a j} [f (d_{a j}, {\hat{β}}_{d}), \cdot]$ is the predicted probability of choice of practice evaluated at the mean of quality and of the non‐distance explanatories, T is the number of LSOA‐practice combinations and $f (d_{a j}, {\hat{β}}_{d})$ is a linear, quadratic, cubic, quartic or quintic function of distance. ${\hat{P}}_{a j} [f (d_{a j}, {\hat{β}}_{d}), \cdot]$ is derived from models with same quality measure and covariates as Table 2.