The Rivals: Paul Samuelson and Milton Friedman arrive at the University of Chicago – in 1932

Friedman arrived that autumn from New Jersey as a graduate student. A pair of Columbia University graduate students, Arthur Burns and Homer Jones,   had been among his teachers at Rutgers University; they had urged him to defer his plan to become an actuary in favor of economics.

.. Milton Friedman and I became known as two poles, early on, but we managed to stay on civil and fairly friendly terms….  He is as bright a guy as you would ever meet. But I don’t think he realizes the tremendous number of mistakes he has made in his life. I don’t think anybody has read every item of Milton Friedman’s work in the world but me….  Sometimes I say he’s got such a high IQ that he’s got no protection against himself.  He looks at his work and is satisfied with it. However, I think that it is a tragedy when somebody really takes the wrong train in life.

.. Samuelson arrived at Harvard in September 1935, expecting, he later said, a tidy little New England town. Instead he found a grimy industrial city with an old university at the leafy end of town.

.. Samuelson would talk to him for an hour after every lecture; it was in Wilson’s class that Samuelson had perhaps his single greatest epiphany, he recalled: the recognition that the truth of  a mathematical tool was  independent of  the context in which it was employed. In this case it was the mathematics underlying a principle devised a century before by French chemist Henry LeChatelier to describe changes in pressure, volume and temperature of an ideal gas which could just as easily be adapted to calculate changes in elasticities of demand in a system of factor prices. The mathematical insight arrived in an instant. It would take a decade to reason through its implications.

.. Samuelson would recall: “He would say, ‘You never in economics kill a theory by fact; you kill a theory by a better theory.’”

.. pay attention instead to what consumers do with their money. The doctrine of “revealed preference” gave economists something to measure. Samuelson was “operationalizing” economics, defining a previously fuzzy concept in such a way that meaningful theorizing about it could be undertaken with a view to eventual testing.

.. Friedman found himself on the losing side of a department divided into two warring camps – quantitative up-and-comers vs. well-entrenched institutionalists. Friedman’s appointment suffered from a certain amount of straightforward anti-Semitism as well. When the department failed to approve the administration’s offer of a professorship, Friedman withdrew and returned east, to a job in the Treasury Department. Embarrassment and bitterness over the affair plagued the Wisconsin department for many years.

.. he timing of the invasion of Europe hinged on estimates of gross national product by Kuznets and his student Robert Nathan and their new National Income and Product Accounts ..

.. Friedman was assigned to build a Keynesian model of how much to raise taxes to pay for war. He helped create the income tax withholding system – an institution whose durability he came to regret in later years.

.. Friedman financed his drive to the Twin Cities by selling his furniture to the next family to rent his apartment

.. He came across stenographic copy of testimony he had given to a Congressional Committee as a Treasury official, explaining why an income tax would be better than a sales tax in preventing inflation. The war was six months old.  “If inflation is to be prevented, it must be neutralized by measures that restrict consumer spending. Taxation is the most important of these measures; unless it is used quickly and severely, the other measures alone will be unable to prevent inflation.”

.. At every point, Friedman was dogged by suspicions elsewhere that his methods didn’t fully measure up to modern standards. The jokes multiplied:  “Milton knows how to spell banana but he doesn’t know when to stop.”

.. Experience in controversies such as these brings out the impossibility of learning anything from facts till they are examined and interpreted by reason; and teaches that the most reckless and treacherous of all theorists is he who professes to let facts and figures speak for themselves, who keeps in the background the part he has played, perhaps unconsciously, in selecting and grouping them, and in suggesting the argument post hoc ergo propter hoc.

What Jeb Bush Gets Right—and Wrong—About American Workers

The health of American society is best judged by the condition of the typical working American. What that person needs is a tighter labor market, and healthcare costs that rise more slowly. Instead, Democrats are readying an offer of more regulation, more government spending, and more income redistribution. Republicans will likely counter with more upper-income tax cuts, less health coverage, and more immigration.

Neither set of policies seems to speak to what Americans actually need. No wonder so many voters are turning to ideologues like Bernie Sanders, or to flim-flam men like Donald Trump.

Stirling Behavioural Science: List of 19 Natural Experiments

Angrist’s PhD thesis examined whether serving in the army negatively affected people’s future income. This is trickier to estimate than it may seem. Simply comparing the wages of people who served in the army against those who didn’t would not be evidence of a causal relationship, since people who enter the army may differ in important ways from those who don’t, and these differences may in turn affect their income potential. What is really needed is a source of randomization which takes a group of men and forces some of them into the army.
Just such a randomization tool was provided in the 1970s by the American government, which ran televised draft lotteries (wiki) during the Vietnam War to select young men to be inducted into the army. This process essentially placed otherwise similar men into a treatment group (those who were drafted) and a control group (those who weren’t) by randomly selecting birth days of the year ranging from 1 to 366 (February 29 was included).
By combining the birth records of those born in 1950-53 with later earnings data drawn from a 1% sample of all social security numbers, Angrist found that, among white men, drafted veterans went on to earn 15% less than their peers who had avoided the army.
..  Since Pennsylvania did not change its minimum wage, this makes it the control group. If we consider New Jersey and Pennsylvania to be comparable, then we would have expected to see Pennsylvania’s downwarding sloping trend replicated in New Jersey if New Jersey had not increased its minimum wage. But we don’t see this; in fact there is a slight increase in the average number of employees in New Jersey restaurants. The authors interpret this as showing that the rise in the minimum wage did not reduce employment. Further studies on this topic are reviewed here by Schmitt
.. They found that 7-year old Muslims whose pregnancies overlapped with Ramadan performed worse in maths, reading and writing than comparable Muslim children born to mothers where Ramadan fell soon after birth. These effects were largest (0.08 standard deviations) when Ramadan overlapped with the first three months of gestation, possibly reflecting the importance of biological processes during that time, and/or greater levels of fasting compliance among pregnant Muslim women who may have been unaware that they were pregnant.
.. They find that exposure to the famine in the prenatal environment predicted higher adult rates of obesity, diabetes and schizophrenia.