The salad days of real estate investing are long behind us. But that hasn’t stopped emerging managers — loosely defined as firms with no more than $750 million and three funds under management — from proliferating in recent years, even as the bar that investors have set for manager selection has gotten even higher. Few pension funds have established emerging manager programs because the cost is steep. Despite all of this, many of the people in and around the emerging manager business still get frothy about the topic.