Are rising corporate profit margins driven by more technology companies?
Core argument: Corporate profit margins tracked across roughly three decades of Damodaran's datasets show a clear upward trend over the period.
I have tracked profit margins for companies for a long time (about three decades) in my datasets, and there is clear evidence that they have trended upwards during the period. The most salient rationale for margin increases, is that the composition of the market has changed, as technology companies supplant old-economy companies, bringing superior unit economics and economies of scale to play. Put simple, a market that gets the largest portion of its value from tech companies will deliver much higher margins than one that gets much of its value from manufacturing and service businesses.

