Formally, gatekeeping was identified in Lewin's (1943) publication "Forces Behind Food Habits and Methods of Change". Working during World War II, Kurt Lewin conducted field research initially among Midwestern housewives to determine how to effectively change their families' food consumption during this time of war. Lewin recognized that for food to go from a store or a garden to the dining table, there were various decision-making processes it had to pass on the way there. At a time when men were thought to control all household decisions, Lewin found that "food does not move by its own impetus. Entering or not entering a channel and moving from one section of a channel to another is affected by a 'gatekeeper'" (p. 37). The gatekeeper, in this case, was typically the housewife, or sometimes a maid in more affluent households. Lewin's research demonstrated that not all members of a family have equal weight in making household food decisions and that the wife, who typically shops for and prepares the food controls the gates, based on a variety of considerations. Lewin's study published in 1943 became the impetus for another article in 1947 in which he introduces the idea of feedback in group decision making, which complicates the role of the gatekeeper. Feedback acknowledges that the set of considerations a gatekeeper uses in making decisions may vary depending on considerations of the group.