“…If changes in the quantity of opioids dispensed in the USA are determined by economic incentives to suppliers based on the price of the raw material, this mechanism can be expected to be stronger in areas with higher ex‐ante exposure to opioids, as proxied by (the log of) the per capita number of mining sites in 1983. These counties would represent the most fertile local markets for analgesics, where PO promotion campaigns presumably have the greatest chance of success (Cutler and Glaeser,
2021; Alpert et al .,
2022). Accordingly, we estimate the following model:
where
is the log change in the per capita amount of morphine gram equivalent (MGE) dispensed in county
between quarter
and quarter
,
is the log change in the average price of dry opium in Afghanistan between quarters
and
, and
…”