Maximally representative allocations for guaranteed delivery advertising campaigns

There are around 400 advertising networks that match opportunities for “display” advertising, which include banner ads, video ads and indeed all ads other than text-based ads, on web pages and candidate advertisements. This is about a $${\$}25$$  billion business annually. The present study derives a method of pricing such advertisements based on their relative scarcity while ensuring that all campaigns obtain a reasonably representative sample of the relevant opportunities. The mechanism is well-behaved under supply uncertainty. A method based on the mechanism described in this paper was implemented by Yahoo! Inc.     

Occupational sex segregation in agriculture: Evidence on gender norms and socio-emotional skills in Nigeria

Occupational sex segregation is a key driver of the gender gap in earnings. Using data from 11,691 aspiring agribusiness entrepreneurs in Nigeria, this article explores factors that drive sectoral choice, gender differences in the choice decision, and especially the role played by norms around gender roles. When given a choice of 11 agricultural value chains in a government program, we find the majority (54 percent) of the applicants chose to enter into the poultry value chain, and women were more likely to choose poultry than men. This article finds evidence of more restrictive gender norms in Northern Nigeria states, which lowers women's likelihood of entering into agricultural value chains where the potential for profit may be higher. The gender bias in sectoral choice is also attributed to differences in work experience especially in agricultural activities and in the chosen value chain, as well as in land ownership. Women with more experience in male-dominated agricultural value chains exhibit lower self-efficacy, which could reflect the challenges they face when deviating from social norms to operate within nontraditional value chains.