WITH the academic year about to begin, colleges and universities, as well as students and their parents, are facing an unprecedented financial crisis. What we’ve seen with California’s distinguished state university system  huge cutbacks in spending and a 32 percent rise in tuition  is likely to become the norm at public and private colleges. Government support is being slashed, endowments and charitable giving are down, debts are piling up, expenses are rising and some schools are selling their product for two-thirds of what it costs to produce it. You don’t need an M.B.A. to know this situation is unsustainable.

With unemployment soaring, higher education has never been more important to society or more widely desired. But the collapse of our public education system and the skyrocketing cost of private education threaten to make college unaffordable for millions of young people. If recent trends continue, four years at a top-tier school will cost $330,000 in 2020, $525,000 in 2028 and $785,000 in 2035.

Yet most faculty and administrators refuse to acknowledge this crisis. Consider what is taking place here in New York City. Rather than learning to live within their means, Columbia University, where I teach, and New York University are engaged in a fierce competition to expand as widely and quickly as possible. Last spring, N.Y.U. announced plans to increase its physical plant by 40 percent over the next 20 years; this summer Columbia secured approval for its $6.3 billion expansion in Upper Manhattan. N.Y.U. is also opening a new campus in Abu Dhabi this fall.

The financial arrangements for these projects remain obscure, but it is clear that they will not be completed without increasing the universities’ already significant and perhaps unsustainable levels of debt. Last year Columbia reported $1.4 billion in outstanding debt against a $5.89 billion endowment. N.Y.U. had a staggering $2.22 billion debt with a relatively modest $2.2 billion endowment  one that had shrunk by more than 11 percent over the previous fiscal year. For universities, as for banks, the question is not only the value of current and projected assets but also the availability of liquidity so they can pay off interim debt obligations during a time of financial instability.