It took me a while to “get” real estate. I used to think the person down the street who owned the office building or the neighborhood shopping center was one of us, a member of the community, invested in our broader success.

I came by that view because I grew up in Columbia, where the developer of our planned community, the late James Rouse, was a neighbor. His headquarters were downtown. Whatever happened in our suburb seemed part of his master plan, and being early inhabitants, we wanted the best for our new home.

Over the years, I’ve learned the world is more complicated. Yes, development is still driven by people with vision, but ownership is more fractured. The developer may, or may not, have actual money in the game. The people who put up the money may, or may not, be from around here; their investment horizon varied. The on-the-ground managers may be members of the community, or they might be staff from some distant enterprise, rotated in to deal with some of-the-moment operational issue.

In Columbia, new companies have arrived on the scene, with new ideas for downtown.

The real estate model is not all that different from how a lot of businesses are run these days. We think of them as assets. We hire financial whizzes to chop them up or merge them together, in hopes of unlocking new value. We sell stakes. We plan exits.

The business, whatever it is, seems less interesting than the movement.

Perhaps that’s necessary in a sluggish economy, where organic growth is hard to come by and expansion must be manufactured.

The gears are turning. In the past few weeks, some prominent companies that grew up here have been bought or sold, names such as Coventry Health Care, Sunrise Senior Living and Deltek. New ownership is taking over, and the local scene just got a little more complicated.