What can explain these huge spillover effects of education?

In fact, this effect is so strong that when someone gets a college degree, the spillover effects of this on the wages of others in the metropolitan area are actually greater than the direct effects.

And it's a complex sales growth chart because in the first couple of years you're just kind of getting the spillover of people who kind of think you're just a competitor in the existing market and your sales will kind of toddle along until if you're correct and you were right about that niche or low cost segmentation you will start seeing an exponential increase in sales.