simple as determining the appropriate wage rate. Empirical evidence from rural Ethiopia shows that higher-income households had excess labor and thus lower (not higher as expected) value of time, and therefore allocated this labor to FFW schemes in which poorer households could not afford to participate due to labor scarcity. Similarly, FFW programs in Cambodia have shown to be an additional, not alternative, source of employment and that the very poor rarely participate due to labor constraints. Furthermore, food aid can drive down local or national food prices in at least three ways. First, monetization of food aid can flood the market, increasing supply. In order to be granted the right to monetize, operational agencies must demonstrate that the recipient country has adequate storage facilities and that the monetized commodity will not result in a substantial disincentive in either domestic agriculture or domestic marketing. Second, households receiving aid may decrease demand for the commodity received or for locally produced substitutes or, if they produce substitutes or the commodity received, they may sell more of it. This can be most easily understood by dividing a population in a food aid recipient area into subpopulations based on two criteria: whether or not they receive food aid (recipients vs. non-recipients) and whether they are net sellers or net buyers of food. Because the price they receive for their output is lower, however, net sellers are unambiguously worse off if they do not receive food aid or some other form of compensatory transfer. Finally, recipients may sell food aid to purchase other necessities or complements, driving down prices of the food aid commodity and its substitutes, but also increasing demand for complements. Most recipient economies are not robust and food aid inflows can cause large price decreases, decreasing producer profits, limiting producers' abilities to pay off debts and thereby diminishing both capacity and incentives to invest in improving agricultural productivity. However, food aid distributed directly or through FFW programs to households in northern Kenya during the lean season can foster increased purchase of agricultural inputs such as improved seeds, fertilizer and hired labor, thereby increasing agricultural productivity. Corruption A 2020 article published in Studies in Comparative International Development analyzed contract-level data over the period 1998 through 2008 in more than a hundred recipient countries. As a risk indicator for corruption, the study used the prevalence of single bids submitted in "high-risk" competitive tenders for