While there has been evidence and research to support the existence of short-term mating in women, it has nevertheless been shown that women prefer long-term partners over short-term mates. This preference is due to women's tendency to invest and require more energy for parental care. In long-term mating arrangements, women typically look for males who will provide a high level of parental investment, and who can provide resources to the woman or to her offspring. The provision of economic resources, or the potential to acquire many economic resources, is the most obvious cue towards the ability of a man to provide resources, and women in the United States have been shown experimentally to rate the importance of their partner's financial status more highly than men. However, many other traits exist that may act as cues towards a man's ability to provide resources that have been sexually selected for in women's evolutionary history. These include older age—older males have had more time to accrue resources—industriousness, dependability and stability—if a woman's long-term partner is not emotionally stable or is not dependable then their provision of resources to her and her offspring are likely to be inconsistent. Additionally, the costs associated with an emotionally unstable partner such as jealousy and manipulation may outweigh the benefits associated with the resources they are able to provide.