我国的不动产物权的变动主要以债权合意并进行登记方发生法律效力，买受人自签订商品房买卖合同到取得所有权登记存在一定的时间差。而房地产业在我国是一项新兴行业，相关法律法规的制定滞后于房地产业的迅猛发展，再加上经济社会中经济人的逐利本质，房地产开发商不顾信用而一房两卖、甚至一房数卖，损害买受人权利的现象曾时有发生。在实践中，商品房二重买卖的情形多种多样，情况各有不同。其中一种特殊的商品房二重买卖，也就是通常所称的“假按揭”现象较为普遍。所谓“假按揭”现象，即开发商以“一房两卖”的形式与特定关系人串通签订商品房买卖合同，并办理按揭贷款以套取银行借款，该买受人并不真正以取得房屋所有权为目的。此后，开发商...In our country, the changes of in rem of real estate is not legally effective unless having reached an consensus on creditor’s right and the r finished the registration. There is time lapse between the buyer having signed the commodity housing buying-selling contract and the registration of the ownership of the commodity housing. The real estate sector is a fresh sector in China, relevant laws ar...学位：法律硕士院系专业：法学院法律系_法律硕士(JM)学号：X200512011
