IMAGINE that you are watching an outdoor theater production while sitting on the grass. You have difficulty seeing, so you prop yourself up on your knees. Soon everyone behind you does the same. Eventually, most people are kneeling or standing, yet they are less comfortable than they were before and have no better view. Everyone should sit down, and everyone knows it, but no one does.

This is a collective action problem, a phenomenon that is, unfortunately, all too common. At the moment, the trouble in our real estate markets and the drag these markets are placing on our entire economy may be understood as a collective action problem. In a nutshell, mortgage lenders need to write down the amounts owed by individual homeowners — that is, let everyone sit down and relax — but the different stakeholders have been unable to reach an agreement, even if it is in their common interest.

In the 1971 book “The Logic of Collective Action: Public Goods and the Theory of Groups,” the economist Mancur Olson argued that collective action problems are pervasive, plaguing nations and economic groups alike. “Most groups cannot provide themselves with optimal amounts of a collective good,” he said, because they cannot manage a “selective incentive” or arrange “coercion or some reward.”

In the current real estate market, the relevant group is enormous and complex. It includes those who own first and second mortgages or home equity lines of credit or residential mortgage-backed securities or the various tranches of mortgage collateralized debt obligations or shares in banks and finance companies that in turn own mortgages. These people live all over the world and have no way of communicating with each other, let alone coming to an agreement to give homeowners a break.