American dream or American obsession? The economic benefits and costs of homeownership

Homeownership, like baseball and hotdogs, is an integral part of the American culture. Over the past 70 years, the U.S. government has devoted significant public resources to encouraging and promoting homeownership. The recent financial crisis has prompted the government to spend even more on preserving homeownership, despite the fact that the financial crisis itself was led by the meltdown of the U.S. housing market. Now, an increasing number of academicians and media reporters are questioning the previously unquestionable: Has the American dream turned into an American obsession? In “American Dream or American Obsession? The Economic Benefits and Costs of Homeownership,” Wenli Li and Fang Yang analyze the economic benefits and costs associated with owning one’s residence. They re-examine a variety of rationales that have been put forward in support of homeownership and examine the evidence for an economic cost associated with homeownership.Home ownership

On Structure of cluster algebras of geometric type I: In view of sub-seeds and seed homomorphisms

Our motivation is to build a systematic method in order to investigate the structure of cluster algebras of geometric type. The method is given through the notion of mixing-type sub-seeds, the theory of seed homomorphisms and the view-point of gluing of seeds. As an application, for (rooted) cluster algebras, we completely classify rooted cluster subalgebras and characterize rooted cluster quotient algebras in detail. Also, we build the relationship between the categorification of a rooted cluster algebra and that of its rooted cluster subalgebras. Note that cluster algebras of geometric type studied here are of the sign-skew-symmetric case.Comment: 41 page