Category: Data Source

The Shrug platform is now open

The Socioeconomic High-resolution Rural-Urban Geographic Platform for India (SHRUG) is a geographic platform that facilitates data sharing between researchers working on India. It is an open access repository currently comprising dozens of datasets covering India’s 500,000 villages and 8000 towns using a set of a common geographic identifiers that span 25 years.

Here is the link, this was a program, with Paul Novosad and Sam Asher, supported by Emergent Ventures.

Ideological bias and argument from authority among economists

That is the topic of a new paper by Mohsen Javdani and Ha-Joon Chang, here is part of the abstract:

Using an online randomized controlled experiment involving economists in 19 countries, we examine the effect of ideological bias on views among economists. Participants were asked to evaluate statements from prominent economists on different topics, while source attribution for each statement was randomized without participants’ knowledge. For each statement, participants either received a mainstream source, an ideologically different less-/non-mainstream source, or no source. We find that changing source attributions from mainstream to less-/non-mainstream, or removing them, significantly reduces economists’ reported agreement with statements. This contradicts the image economists have of themselves…

And from the paper:

Consistent with our overall findings, we find that for all but three statements, changing source attributions to a less/non-mainstream source significantly reduces the agreement level. The estimated reductions range from around one-tenth of a standard deviation to around half of a standard deviation.

The largest agreement reduction is for this sentence:

“Economic discourse of any sort — verbal, mathematical, econometric — is rhetoric; that is, an effort to persuade.”

You also can test which kinds of authority reassignation alter the level of agreement.  And thus:

We find that the estimated ideological bias among female economists is around 40 percent less than their male counterparts.

The countries where economists exhibit the highest ideological bias are Ireland, Japan, Australia, and Scandinavia, where for Austria, Brazil, and Italy the ideological bias is smallest.  South Africa, France, and Italy are most conformist to mainstream opinion.

It is a wordy and poorly written paper, and they don’t consider the possibility that deference to authority perhaps is the rational Bayesian move, not the contrary.  Still, it has numerous results of interest.  Here is the authors’ blog post on the paper.

Do mass shootings lead to liberalized gun laws?

It seems so, at least in Republican-controlled states:

There have been dozens of high-profile mass shootings in recent decades. This paper presents three main findings about the impact of mass shootings on gun policy. First, mass shootings evoke large policy responses. A single mass shooting leads to a 15% increase in the number of firearm bills introduced within a state in the year after a mass shooting. This effect increases with the extent of media coverage. Second, mass shootings account for a small portion of all gun deaths, but have an outsized influence relative to other homicides. Third, when looking at bills that were actually enacted into law, the impact of mass shootings depends on the party in power. The annual number of laws that loosen gun restrictions doubles in the year following a mass shooting in states with Republican-controlled legislatures. We find no significant effect of mass shootings on laws enacted when there is a Democrat-controlled legislature, nor do we find a significant effect of mass shootings on the enactment of laws that tighten gun restrictions.

That is the abstract of a new NBER working paper by Michael Luca, Deepak Malhotra, and Christopher Poliquin.

East Germany fact of the day

Evidence of a widening gulf has become too copious to ignore. Last month, for example, a poll by the Allensbach Institute asked eastern Germans whether they saw democracy as practised in Germany as the best form of government. Only 31 per cent agreed. Two years ago, the figure was 53 per cent.

In western Germany, meanwhile, 72 per cent described democracy as the best form of government, broadly unchanged from two decades ago.

The same divergence shows up when Germans in both parts of the country are asked about their identity: 47 per cent of eastern Germans say they identify above all as eastern Germans, compared with only 44 per cent who feel simply German. This, too, is a sharp reversal from only a few years ago.

Also striking is the sheer persistence of specifically eastern German views and stereotypes: even 30 years after the fall of the wall (and with an east German chancellor, Angela Merkel, holding office since 2005), more than a third of eastern Germans describe themselves as “second-class citizens”.

That is from Tobias Buck in the FT.

Estimating US Consumer Gains from Chinese Imports

>We estimate the size of US consumer gains from Chinese imports during 2004–2015. Using barcode-level price and expenditure data, we construct inflation rates under CES preferences, and use Chinese exports to Europe as an instrument. We find significant negative effects of Chinese imports on US prices. This effect is driven by both changes in the prices of existing goods and the entry of new goods, and it is similar across consumer groups by income or region. A simple benchmarking exercise suggests that Chinese imports led to a 0.19 percentage point annual reduction in the price index for consumer tradables.

That is from AER Insights by Liang Bai and Sebastian Stumpner.  I would have expected a somewhat higher magnitude, and perhaps this in part explains why the trade war has been proceeding.

Watch out for the weakies!: the O-Ring model in scientific research

Team impact is predicted more by the lower-citation rather than the higher-citation team members, typically centering near the harmonic average of the individual citation indices. Consistent with this finding, teams tend to assemble among individuals with similar citation impact in all fields of science and patenting. In assessing individuals, our index, which accounts for each coauthor, is shown to have substantial advantages over existing measures. First, it more accurately predicts out-of-sample paper and patent outcomes. Second, it more accurately characterizes which scholars are elected to the National Academy of Sciences. Overall, the methodology uncovers universal regularities that inform team organization while also providing a tool for individual evaluation in the team production era.

That is part of the abstract of a new paper by Mohammad Ahmadpoor and Benjamin F. Jones.

Marijuana complacency sentences to ponder

…an additional dispensary in a neighborhood leads to a reduction of 17 crimes per month per 10,000 residents, which corresponds to roughly a 19 percent decline relative to the average crime rate over the sample period. Reductions in crime are highly localized, with no evidence of spillover benefits to adjacent neighborhoods.

That is from a newly published paper by Jeffrey Brinkman and David Mok-Lamme, via the excellent Kevin Lewis.

Paris fact of the day

The number of people living in the Paris departement, or administrative area, dropped by an average of 11,900 people a year between 2011 and 2016, the most recent figures available, according to the national statistics agency. Paris’s urbanism institute, Apur, forecasts that the decline of the inner city population will continue for about another six years.

It is a sharp contrast with the urban renaissance that has taken place in many of the world’s major cities over the past 20 years, but Paris is not alone.

New York City shed a net 39,500 people in 2018 and 37,700 the year before, reversing the previous upward trend.

In London, the population is still growing, bolstered by births and international immigration; but when it comes to internal migration, the net movement of people out of the UK city totalled more than 100,000 in the year to June 2018.

That is from Judith Evans in the FT on shrinking cities.

Latitude

Are there systematic trends around the world in levels of creativity, aggressiveness, life satisfaction, individualism, trust, and suicidality? This article suggests a new field, latitudinal psychology, that delineates differences in such culturally shared features along northern and southern rather than eastern and western locations. In addition to geographical, ecological, and other explanations, we offer three metric foundations of latitudinal variations: replicability (latitudinal gradient repeatability across hemispheres), reversibility (north-south gradient reversal near the equator), and gradient strength (degree of replicability and reversibility). We show that aggressiveness decreases whereas creativity, life satisfaction, and individualism increase as one moves closer to either the North or South Pole. We also discuss the replicability, reversibility, and gradient strength of (a) temperatures and rainfall as remote predictors and (b) pathogen prevalence, national wealth, population density, and income inequality as more proximate predictors of latitudinal gradients in human functioning. Preliminary analyses suggest that cultural and psychological diversity often need to be partially understood in terms of latitudinal variations in integrated exposure to climate-induced demands and wealth-based resources. We conclude with broader implications, emphasizing the importance of north-south replications in samples that are not from Western, educated, industrialized, rich, and democratic (WEIRD) societies.

Here is the article, via several MR readers.

Is There a Gender Wage Gap in Online Labor Markets?

The subtitle of the paper is: “Evidence from Over 250,000 Projects and 2.5 Million Wage Bill Proposals” and here is the abstract:

We explore whether there is a gender wage gap in one of the largest EU online labor markets, PeoplePerHour. Our unique dataset consists of 257,111 digitally tradeable tasks of 55,824 hiring employers from 188 countries and 65,010 workers from 173 countries that made more than 2.5 million wage bill proposals in the competition for contracts. Our data allows us to track the complete hiring process from the employers’ design of proposed contracts to the competition among workers and the final agreement between employers and successful candidates. Using Heckman and OLS estimation methods we provide empirical evidence for a statistically significant 4% gender wage gap among workers, at the project level. We also find that female workers propose lower wage bills and are more likely to win the competition for contracts. Once we include workers’ wage bill proposals in the regressions, the gender wage gap virtually disappears, i.e., it is statistically insignificant and very small in magnitude (0.3%). Our results also suggest that female workers’ higher winning probabilities associated with lower wage bill proposals lead to higher expected revenues overall. We provide empirical evidence for heterogeneity of the gender wage gap in some of the job categories, all job difficulty levels and some of the worker countries. Finally, for some subsamples we find a statistically significant but very small “reverse” gender wage gap.

Here is the paper by Estrella Gomez Herra and Frank Mueller-Langer, via Luke Froeb.

“A national experiment reveals where a growth mindset improves achievement”

I don’t believe this result, from David S. Yeager, et.al., but I put it out for your consideration, just published in Nature and receiving much attention:

A global priority for the behavioural sciences is to develop cost-effective, scalable interventions that could improve the academic outcomes of adolescents at a population level, but no such interventions have so far been evaluated in a population-generalizable sample. Here we show that a short (less than one hour), online growth mindset intervention—which teaches that intellectual abilities can be developed—improved grades among lower-achieving students and increased overall enrollment to advanced mathematics courses in a nationally representative sample of students in secondary education in the United States. Notably, the study identified school contexts that sustained the effects of the growth mindset intervention: the intervention changed grades when peer norms aligned with the messages of the intervention. Confidence in the conclusions of this study comes from independent data collection and processing, pre-registration of analyses, and corroboration of results by a blinded Bayesian analysis.

Big if true, as they say.  Via many of you, thanks.

Addendum: Alex covered this as a working paper last year with more details.

How honest again is big business?

“A 2015 study of self-checkouts with handheld scanners, conducted by criminologists at the University of Leicester, also found evidence of widespread theft. After auditing 1 million self-checkout transactions over the course of a year, totaling $21 million in sales, they found that nearly $850,000 worth of goods left the store without being scanned and paid for. The Leicester researchers concluded that the ease of theft is likely inspiring people who might not otherwise steal to do so…. As one retail employee told the researchers, ‘People who traditionally don’t intend to steal [might realize that] … when I buy 20, I can get five for free.’

The links are here and here, via The Browser.  And here is the deal on all those super-centenarians.

The Entire German Yield Curve is Trading Below Zero

The German government could today borrow billions of Euro and in a decade they could give back to investors less than they borrowed and the investors would be happy. Does the German government have no net positive investments to make?

The global savings glut which drives asset prices higher and makes them more volatile is very much still with us. Around the world there is now over 15 trillion in negative interest debt.

From the FT.

The labor share is not in general falling

We study the joint impact of three measurement issues in the empirical literature on the labor share: (i) start and end periods for the empirical analysis; (ii) accounting for self-employment; and (iii) accounting for residential real estate income. When we correct for these three potential biases, we do not find a general decline in the labor share in our sample of advanced economies. In that respect the behavior of the US labor share after 2000 presents a puzzle.

That is from a new NBER Working Paper by Gilbert Cette, Lorraine Koehl, and Thoimas Philippon.