In the case of the draft lottery, if we are interested in learning about the effects of draft-eligibility and military service on subsequent labor market earnings, we can compare outcomes for people whose birthdates were below the lottery cutoff (e.g., September 14, April 24, etc.) with the outcomes for people whose birthdays were after the cutoff (e.g., February 20, December 2, etc.).
Kwa upande wa rasimu ya bahati nasibu, ikiwa tuna nia ya kujifunza kuhusu athari za kustahiki kuandikishwa na huduma ya kijeshi kwenye mapato ya baadaye ya soko la ajira, tunaweza kulinganisha matokeo ya watu ambao tarehe zao za kuzaliwa zilikuwa chini ya muda uliopunguzwa wa bahati nasibu (k.m., Septemba 14, Aprili 24, na kadhalika.) pamoja na matokeo kwa watu ambao siku zao za kuzaliwa zilikuwa baada ya kukatwa (k.m., Februari 20, Desemba 2, nk.).