@ARTICLE\{IMM2007-05055,
    author       = "R. Poulsen and K. M. Rasmussen",
    title        = "Financial Giffen Goods: Examples and Counterexamples",
    year         = "2007",
    keywords     = "Portfolio choice, Giffen good, Mortgage Financing",
    journal      = "European Journal of Operational Research",
    volume       = "",
    editor       = "",
    number       = "",
    publisher    = "",
    note         = "In press",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/5055-full.html",
    abstract     = "In the basic Markowitz and Merton models, a stock’s weight in efficient portfolios goes up if its expected rate of return goes up. Put differently, there are no financial Giffen goods. By an example from mortgage choice we illustrate that for more complicated portfolio problems Giffen effects do occur."
}