Jeff Kanne, chief executive of National Real Estate Advisors, tells the Globe’s Shirley Leung why his pension fund has hit the brakes on financing big development projects in Boston: Mayor Wu’s affordability set-asides and energy efficiency requirements as well as the prospect of rent control becoming law in Massachusetts. … Yes, high construction costs and interest rates are also factors when firms consider building in Boston. But those same conditions exist in other cities – and yet those cities are seeing construction, Kanne notes. … It’s a good column by Shirley.