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The fourth reference month of 1996, wave 2 covers July through October 1996, a time when the major expansion of the early 1990s had subsided.
Finally, we select the fourth reference month for each wave10, and use the last weeks' employment status, which corresponds to the standard CPS employment measure.
The fourth reference month of 1990, wave 1 covers January through April 1990, just before the recession of 1990/1991 and the expansion of the DI program started11.
We use labor-force survey data to implement a sharp regression-discontinuity framework, in which the running variable is the distance of the individual birth month to a certain reference month, as well as an incremental differences-in-differences approach.
Real hourly wages are calculated as the sum of wages earned in the reference month from primary jobs, adjusted for average number of work days per month and average hours per day.
The number of reimbursement claims is modelled using a fixed effect for each municipality (α i ), a dummy for the introduction of the electronic prescription system in the municipalities (D i,t ) and eleven monthly dummies (M j ), using January as a reference month.
Similar(52)
I read John McPhee's piece on alienating allusions with interest ("Frame of Reference," March 9th).
Seasonal changes should also be minimal as fish were collected during the months of April (reference) and June (exposed).
The average number of deaths per day for the road dust period (November through May) was 29.6 (range, 13 52), and for the reference season (June through October) was 26.8 (range, 12 50).
The agency changed that reference in June or July of 2015 to say "In a small percentage of cases, these symptoms can last for more than 6 months".
Also, for the reference period June through October, changes in effect estimates were small after adjustments for CO and O3.
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