From his essay:
"Or consider this: across the labor market, many of the jobs that are both fastest growing and in highest demand are those that bring together different skill sets, like marketing and data analysis, or graphic design and programming. Such positions, which have grown by 53 percent over the last four years alone, are often hard to fill because technically oriented training programs tend to be tightly focused. By contrast, these “hybrid jobs” require people who can bridge domains and synthesize ideas.
Liberal arts graduates may not have direct training in those domains, but the liberal arts live within the core framework of interdisciplinary synthesis and critical evaluation. That’s a world apart from more technically oriented programs that dispatch their graduates into the workforce with a fixed portfolio of skills that, while marketable, may be of fleeting currency. In fact, even within a given occupation, the core work activities can evolve quickly, rendering a “practical” program obsolete. In the fast-growing field of data analysis, the entire skill set has shifted over just a three-year span away from pure statistical computation to place much more emphasis on visualization and business analysis."