Earlier this year, I wrote about the declining number of early-stage venture deals and in the number of startups entering the venture-backed pipeline in the United States. As I think about the overall health of American entrepreneurship, this development raises some questions. Is the early-stage decline driven by factors on the supply-side (investors) or the demand-side (startups)? Or is it both? Does it reflect an overheated market simply returning to normal, or are other factors at play? As one example, is this evidence of winner-take-all markets, whereby fewer startups get funded, but those that do raise ever more capital? Is it something else? Is it all of these things? And, should this concern us?