and sharing housework, cleaning, and cooking responsibilities. Conflicts may arise if, for example, residents have different standards of cleanliness, different diets, or different hours of employment or study. Guests and partners may also begin to board frequently, which can raise complications pertaining to utility expenses, additional rent and further possible cleaning duties. Often when these responsibilities go untended, friction may result between co-tenants. For this reason, responsibilities should be delegated and fairly assigned as early as possible in any living arrangement with roommates. A clear and defined list of alternating chores and bill lists are easy to see and enforce. Roommates matter, as they have a great impression upon the ones whom they live with and therefore surround themselves by. More and more research has been produced in order to properly understand this impact. The areas of impact can vary greatly in both positive and negative ways; most important is that individuals should be aware of the possible behaviour and social changes that may happen when living with a roommate. Eating and drinking habits Living with an individual who exercises and diets can be beneficial because it very often "rubs off" on the other roommates, while a calorie cutting roommate could be a potential negative influence. College is a time that students often start drinking, specifically binge drinking (more than 4 or 5 drinks in a row). By the end of second semester in college 53% of freshman students had binged. Students explained that having a drinking roommate provided a “buddy” to go through it all and was a big influence in the decision to do so. Mood susceptible: "Each happy friend a person has increases that person's probability of being happy by 9 percent and each unhappy friend decreases it by 7 percent," says Nicholas A. Christakis, a co-author of "Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives". Whether the roommates are friends or not the interactions and behaviors shared and expressed will undoubtedly have an effect on the roommates. Although shown not to be as impressionable as eating habits, our moods can change, specifically more in roommates based on the others emotions. Effects on studies: Studies showed that having a roommate that plays video games causes the other to most likely participate, which reflected in a half-hour less of studying, also showing GPA's .02 lower than others. When dealing with a college