Hispanic Population Growth Now Driven More by Births, Not Immigration
From a Pew Research Center analysis of the latest Census data:
Read More »In the decade from 2000 to 2010, the Mexican-American population grew by 7.2 million as a result of births and 4.2 million as a result of new immigrant arrivals. This is a change from the previous two decades when the number of new immigrants either matched or exceeded the number of births.
The current surge in births among Mexican-Americans is largely attributable to the immigration wave that has brought more than 10 million immigrants to the United States from Mexico since 1970. Between 2006 and 2010 alone, more than half (53%) of all Mexican-American births were to Mexican immigrant parents. As a group, these immigrants are more likely than U.S.-born Americans to be in their prime child-bearing years. They also have much higher fertility.
The Costco Effect: Why Does the Wholesaler Cause Inflation?
There’s a lot of data showing that Walmart causes prices to decline when it enters a local market (see here, here and here). Why then, according to a new study, does Costco have the opposite effect, and cause competitors to raise their prices? The answer boils down to the complex ways that stores choose to compete against each other, and shows that not all big box retailers are created equal. Here’s the abstract:
Read More »Prior research shows grocery stores reduce prices to compete with Walmart Supercenters. This study finds evidence that the competitive effects of two other big box retailers – Costco and Walmart-owned Sam’s Club – are quite different. Using city-level panel grocery price data matched with a unique data set on Walmart and warehouse club locations, we find that Costco entry is associated with higher grocery prices at incumbent retailers, and that the effect is strongest in cities with small populations and high grocery store densities. This is consistent with incumbents competing with Costco along non-price dimensions such as product quality or quality of the shopping experience. We find no evidence that Sam’s Club entry affects grocery stores’ prices, consistent with Sam’s Club’s focus on small businesses instead of consumers.
The Physics of Putting
I always love it when I’ve been doing something one way my whole life, and then someone explains to me there is a better way to do that same thing, and the new way is so simple I can immediately switch and see benefits.
Usually it is a new technology that unlocks the magic. For instance, XM Radio, iTunes and Pandora all fundamentally changed the way I listen to music. My Sonicare toothbrush is a hundred times better than a regular toothbrush. After the creation of seedless watermelons, I would never again intentionally buy one that had seeds. Microwave popcorn is another example.
What is even neater, I think, than a new technology changing things, is when someone just comes up with a better way of thinking about a problem. I’ve done a little bit of reading on the origins of randomized experimentation, and it is fascinating to see how that new and powerful idea emerged.
On a much smaller scale, I’ve recently had that sort of change in my thinking about another issue: how to read putts on the green when playing golf. Read More »
and 
. If you haven’t seen it yet, the movie features Steven Levitt and Stephen Dubner, and was made by a dream team of documentary directors. Paste Magazine named it one of the 