A real estate investor owns a big office-building complex and decides he needs $10 million to invest in energy-efficient improvements. He goes to the bank, where the loan officer says, “Sorry, we don’t do that kind of thing.” When it comes to underwriting commercial real-estate loans, energy efficiency hasn’t been a part of the conversation – but it should be, according to Energy Efficiency and Commercial-Mortgage Valuation, by Nancy Wallace, Dwight Jaffee, and Richard Stanton. Watch the video.