Tennis sentences to ponder

by on March 23, 2017 at 2:49 am in Education, History, Sports | Permalink

[Andre] Agassi pauses when asked if he and his wife [Steffi Graf] sometimes hit a few balls in Vegas – for old time’s sake? “No. It sounds a nice idea. But as soon as you hit the first couple of balls you remember you can do this. But you’re also reminded of what you can’t do. I just thank God I played the game long enough to enjoy lots of good moments. It gave a lot and it took a lot. I think me and tennis are about even now.”

Here is the full interview, interesting throughout.

If you recall, Robert D. Putnam, in his last book, expressed surprise that Chetty and Hendren, (2014) did not find evidence of a decline in intergenerational mobility.  Putnam predicted that researchers would find such evidence soon enough.  After all, it seems the returns to education have been rising, geographic mobility has been falling, market concentration is up slightly, life expectancy is behaving in funny ways, and regional disparities seem to have grown.  Chetty and Grusky, (2016) seemed to paint a more pessimistic picture than did his work from a few years ago, and now we have a new paper by Jonathan Davis and Bhashkar Mazumder:

We demonstrate that intergenerational mobility declined sharply for cohorts born between 1942 and 1953 compared to those born between 1957 and 1964. The former entered the labor market prior to the large rise in inequality that occurred around 1980 while the latter cohorts entered the labor market largely afterwards. We show that the rank-rank slope rose from 0.27 to 0.4 and the IGE rose from 0.35 to 0.51. The share of children whose income exceeds that of their parents fell by about 3 percentage points. These findings suggest that relative mobility fell by substantially more than absolute mobility.

So far this seems to be the current version of the final word.  The authors also argue, by the way, that Chetty (2016) is somewhat too pessimistic, though correct in suggesting mobility has indeed fallen.

By the way, this seems to be the best link for a download.

A new study in press at the Journal of Hand Therapy (yes, a real thing) finds that millennial men may have significantly weaker hands and arms than men the same age did 30 years ago.

Researchers measured the grip strength (how strongly you can squeeze something) and pinch strength (how strongly you can pinch something between two fingers) of 237 healthy full-time students aged 20 to 34 at universities in North Carolina. And especially among males, the reduction in strength compared to 30 years ago was striking.

This surprised me:

But today, older millennial men and women are roughly equal when it comes to grip strength.

Here is the full story, by Christopher Ingraham, via Sonal Chokshi.

Here is part of the book summary:

This book examines SEZs from a political economy perspective, both to dissect the incentives of governments, zone developers, and exporters, and to uncover both the hidden costs and untapped potential of zone policies. Costs include misallocated resources, the encouragement of rent-seeking, and distraction of policy-makers from more effective reforms. However, the zones also have several unappreciated benefits. They can change the politics of a country, by generating a transition from a system of rent-seeking to one of liberalized open markets. In revealing the hidden promise of SEZs, this book shows how the SEZ model of development can succeed in the future.

Here is my blurb:

‘What do Special Economic Zones actually accomplish? And what are their drawbacks and limitations? Lotta Moberg’s The Political Economy of Special Enterprise Zones mixes theory and empirics to offer the very best available answers to these questions.’ ― Tyler Cowen, Professor of Economics, George Mason University, USA

Here is Lotta Moberg’s home page.  Here is a related article of hers on special economic zones.  Here is the Amazon link.

Wednesday assorted links

by on March 22, 2017 at 1:12 pm in Uncategorized | Permalink

Here is one of Noah’s bits:

Smith: OK. I wanted to press you on a couple more things. First, you discuss how productivity growth has slowed down, but you also mention that people might be slacking off a lot more at work. Don’t those two contradict each other? If people are producing the same amount as before in half the time and spending the other half of their day surfing the net, doesn’t that mean true productivity has risen rapidly?

Second, you discuss how matching leads to complacency — how the Internet allows us to find jobs, mates, and consumption goods that are perfectly suited to us, and how this can make us lazy and over-satisfied. But you also talk about how people, especially working-class people, are getting stuck in high-unemployment places. Isn’t better matching part of the solution to the mobility problem?

Here is the whole exchange.

Written for the 40th (!) anniversary of the Cato Institute, here is the clinching summary paragraph:

So we’re going to see a kind of intellectual war, and possibly war in other, more violent forms too. That war, using that word in the broadest sense possible, will be between today’s amazing accumulated stock of human capital — and the emotional momentum behind authoritarianism, which is encouraged by the political fraying that stems from underlying fears of disruption.

The piece has other points of interest.

Their conclusion was that there are 25m tonnes of spiders around the world and that, collectively, these arachnids consume between 400m and 800m tonnes of animal prey every year. This puts spiders in the same predatory league as humans as a species, and whales as a group. Each of these consumes, on an annual basis, in the region of 400m tonnes of other animals.

Somewhere between 400m and 500m tonnes is also the total mass of human beings now alive on Earth.

Here is the Economist article.

Probably so, so says my latest Bloomberg column.  One problem is that interstate mobility as a competitive check has declined, but there are other problems too.  Here is one excerpt:

One unfortunate side effect of today’s political polarization is that voters are more likely select state and local candidates on the basis of whether those individuals profess the same ideology — as defined at the national level — as the voter. In other words, if you think the federal government spends too much on transfer programs, you are more likely to vote for the Republican in your state, whether or not your state spends too much on transfer programs. The incentive for candidates is then to stake out relatively extreme and easily observed positions, to attract the most commonly held ideology in each state. The news media, by devoting most of its coverage to the most highly visible national candidates and issues, makes this problem worse.

One study found that when it comes to votes for the state legislature, the most important factor was the popularity of the sitting president and the president’s party. How well the state’s economy was doing was relatively unimportant. Again, that hardly creates strong incentives for good practical performance. Many state and local issues are more about competence than ideology, including road maintenance, running the prison system and helping to fund K-12 education.

Do read the whole thing.

Walter Olson at Overlawyered reports:

Those free online course materials may be gone from the University of California, Berkeley, courtesy of a U.S. Deparment of Justice interpretation of the Americans with Disabilities Act and related statutes, but they’re not gone from the Internet: “20,000 Worldclass University Lectures Made Illegal, So We Irrevocably Mirrored Them” [LBRY] Won’t that infringe on a lot of copyrights? The site claims not: “The vast majority of the lectures are licensed under a Creative Commons license that allows attributed, non-commercial redistribution.” Earlier coverage here, here, here, and here.

As someone put it, it looks as if the internet recognizes ADA litigation as damage and routes around it.

Jeremy Kauffman at LBRY gives some more detail:

The LBRY protocol provides a completely decentralized network for discovering, distributing, and publishing all types of content and information, from books to movies.

When publishing the lectures to LBRY, the content metadata is written to a public blockchain, making it permanently public and robust to interference. Then, the content data itself is hosted via a peer-to-peer data network that offers economic incentives to ensure the data remains viable. This is superior to centralized or manual hosting, which is vulnerable to technical failure or other forms of attrition.

I wrote about online education and the ADA in Egalitarianism versus Online Education and I’m an adviser to LBRY so I’d like to say that this was my idea but I was not involved!

Tuesday assorted links

by on March 21, 2017 at 12:25 pm in Uncategorized | Permalink

The value of household services was equal to about 37% of GDP in 1965, but is currently equal to about 23% of GDP.

That is from Timothy Taylor.

The central finding of our regression analysis is that firms whose industries were exposed to a greater surge of Chinese import competition from 1991 to 2007 experienced a significant decline in their patent output. A one standard deviation larger increase in import penetration decreased a firm’s patent output by 15 percentage points. Using data from the 1975 to 1991 period and a regression setup that accounts for the diverging secular innovation trends in computers and chemical, we confirm that firms in China-exposed industries did not already have a weaker patent growth prior to the arrival of the competing imports.

…The innovation activity of US firms did not merely shift from the US to other countries. We estimate similar negative effects of import competition on patents by US firms’ domestic employees and by their foreign employees. Instead, our results are most consistent with the notion that the rapid and large increase in competition squeezed firms’ profitability and forced them to downsize along many margins, including innovation. Consistent with that interpretation, we find that the adverse impact of import competition on patent output was concentrated in firms that were already initially more indebted and less profitable.

That is from David Autor, David Dorn, Gordon Hanson, Gary P. Pisano, Pian Shu, with much more at the link.

One of Beijing’s busiest public toilets is fighting the scourge of toilet paper theft through the use technology – giving out loo roll only to patrons who use a face scanner.

The automated facial recognition dispenser comes as a response to elderly residents removing large amounts of toilet paper for use at home.

Now, those in need of paper must stand in front of a high-definition camera for three seconds, after removing hats and glasses, before a 60cm ration is released.

Those who come too often will be denied, and everyone must wait nine minutes before they can use the machine again.

But there have already been reports of software malfunctions, forcing users to wait over a minute in some cases, a difficult situation for those in desperate need of a toilet.

The camera and its software have also raised privacy concerns, with some users on social media uneasy about a record of their bathroom use.

Here is the full story, via Michelle Dawson.