nhaliday + white-paper + books   4

Delta debugging - Wikipedia
good overview of with examples: https://www.csm.ornl.gov/~sheldon/bucket/Automated-Debugging.pdf

Not as useful for my usecases (mostly contest programming) as QuickCheck. Input is generally pretty structured and I don't have a long history of code in VCS. And when I do have the latter git-bisect is probably enough.

good book tho: http://www.whyprogramsfail.com/toc.php
WHY PROGRAMS FAIL: A Guide to Systematic Debugging\
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may 2019 by nhaliday
PRRI: America’s Changing Religious Identity
https://www.washingtonpost.com/blogs/right-turn/wp/2017/09/06/the-demographic-change-fueling-the-angst-of-trumps-base/
https://gnxp.nofe.me/2017/09/08/as-many-americans-think-the-bible-is-a-book-of-fables-as-that-it-is-the-word-of-god/
America, that is, the United States of America, has long been a huge exception for the secularization model. Basically as a society develops and modernizes it becomes more secular. At least that’s the model.

...

Today everyone is talking about the Pew survey which shows the marginalization of the Anglo-Protestant America which I grew up in. This marginalization is due to secularization broadly, and non-Hispanic whites in particular. You don’t need Pew to tell you this.

...

Note: Robert Putnam’s American Grace is probably the best book which highlights the complex cultural forces which ushered in the second wave of secularization. The short answer is that the culture wars diminished Christianity in the eyes of liberals.

Explaining Why More Americans Have No Religious Preference: Political Backlash and Generational Succession, 1987-2012: https://www.sociologicalscience.com/articles-vol1-24-423/
the causal direction in the rise of the “Nones” likely runs from political identity as a liberal or conservative to religious identity

The Persistent and Exceptional Intensity of American Religion: A Response to Recent Research: https://osf.io/preprints/socarxiv/xd37b
But we show that rather than religion fading into irrelevance as the secularization thesis would suggest, intense religion—strong affiliation, very frequent practice, literalism, and evangelicalism—is persistent and, in fact, only moderate religion is on the decline in the United States.

https://twitter.com/avermeule/status/913823410609950721
https://archive.is/CiCok
As in the U.K., so now too in America: the left establishment is moving towards an open view that orthodox Christians are unfit for office.
https://twitter.com/avermeule/status/913880665011228673
https://archive.is/LZiyV

https://twitter.com/tcjfs/status/883764202539798529
https://archive.is/HvVrN
i've had the thought that it's a plausible future where traditional notions of theism become implicitly non-white

https://mereorthodoxy.com/bourgeois-christian-politics/

http://www.cnn.com/2015/05/12/living/pew-religion-study/index.html
http://coldcasechristianity.com/2017/are-young-people-really-leaving-christianity/
Some writers and Christian observers deny the flight of young people altogether, but the growing statistics should alarm us enough as Church leaders to do something about the dilemma. My hope in this post is to simply consolidate some of the research (many of the summaries are directly quoted) so you can decide for yourself. I’m going to organize the recent findings in a way that illuminates the problem:

'Christianity as default is gone': the rise of a non-Christian Europe: https://www.theguardian.com/world/2018/mar/21/christianity-non-christian-europe-young-people-survey-religion
In the UK, only 7% of young adults identify as Anglican, fewer than the 10% who categorise themselves as Catholic. Young Muslims, at 6%, are on the brink of overtaking those who consider themselves part of the country’s established church.

https://en.wikipedia.org/wiki/Postchristianity
Other scholars have disputed the global decline of Christianity, and instead hypothesized of an evolution of Christianity which allows it to not only survive, but actively expand its influence in contemporary societies.

Philip Jenkins hypothesized a "Christian Revolution" in the Southern nations, such as Africa, Asia and Latin America, where instead of facing decline, Christianity is actively expanding. The relevance of Christian teachings in the global South will allow the Christian population in these areas to continually increase, and together with the shrinking of the Western Christian population, will form a "new Christendom" in which the majority of the world's Christian population can be found in the South.[9]
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september 2017 by nhaliday
Too much of a good thing | The Economist
None of these accounts, though, explain the most troubling aspect of America’s profit problem: its persistence. Business theory holds that firms can at best enjoy only temporary periods of “competitive advantage” during which they can rake in cash. After that new companies, inspired by these rich pickings, will pile in to compete away those fat margins, bringing prices down and increasing both employment and investment. It’s the mechanism behind Adam Smith’s invisible hand.

In America that hand seems oddly idle. An American firm that was very profitable in 2003 (one with post-tax returns on capital of 15-25%, excluding goodwill) had an 83% chance of still being very profitable in 2013; the same was true for firms with returns of over 25%, according to McKinsey, a consulting firm. In the previous decade the odds were about 50%. The obvious conclusion is that the American economy is too cosy for incumbents.

Corporations Are Raking In Record Profits, But Workers Aren’t Seeing Much of It: http://www.motherjones.com/kevin-drum/2017/07/corporations-are-raking-in-record-profits-but-workers-arent-seeing-much-of-it/
Even Goldman Sachs thinks monopolies are pillaging American consumers: http://theweek.com/articles/633101/even-goldman-sachs-thinks-monopolies-are-pillaging-american-consumers
Schumpeter: The University of Chicago worries about a lack of competition: http://www.economist.com/news/business/21720657-its-economists-used-champion-big-firms-mood-has-shifted-university-chicago
Some radicals argue that the government is now so rotten that America is condemned to perpetual oligarchy and inequality. Political support for more competition is worryingly hard to find. Donald Trump has a cabinet of tycoons and likes to be chummy with bosses. The Republicans have become the party of incumbent firms, not of free markets or consumers. Too many Democrats, meanwhile, don’t trust markets and want the state to smother them in red tape, which hurts new entrants.

The Rise of Market Power and the Decline of Labor’s Share: https://promarket.org/rise-market-power-decline-labors-share/
A new paper by Jan De Loecker (of KU Leuven and Princeton University) and Jan Eeckhout (of the Barcelona Graduate School of Economics UPF and University College London) echoes these results, arguing that the decline of both the labor and capital shares, as well as the decline in low-skilled wages and other economic trends, have been aided by a significant increase in markups and market power.

...

Measuring markups, De Loecker explained in a conversation with ProMarket, is notoriously difficult due to the scarcity of data. In attempting to track markups across a wide set of firms and industries, De Loecker and Eeckhout diverged from the standard way in which Industrial Organization economists look at markups, the so-called “demand approach,” which requires a lot of data on consumer demand (prices, quantities, characteristics of products) and models of how firms compete. The standard approach, explains De Loecker, works when it is tailor-made for particular markets, but is “not feasible” when studying markups across many markets and over a long period of time.

To do that, De Loecker and Eeckhout use another approach, the “production approach,” which relies on standard, publicly-available balance sheet data and an assumption that firms will try to minimize costs, and does not require other assumptions regarding demand and market competition.

...

Markups, De Loecker and Eeckhout note, do not necessarily imply market power—but profits do. The enormous increase in profits over the past 35 years, they argue, is consistent with an increase in market power. “In perfect competition, your costs and total sales are identical, because there’s no difference between price and marginal costs. The extent to which these two numbers—the sales-to-wage bill and total-costs-to-wage bill—start differing is going to be immediately indicative of the market power,” says De Loecker.

Markup increases, De Loecker and Eeckhout find, became more pronounced following the 2000 and 2008 recessions. Curiously, they find that economy-wide it is mainly smaller firms that have the higher markups, which according to De Loecker is indicative of widely different characteristics between various industries. Within narrowly defined industries, however, the standard prediction holds: firms with larger market shares have higher markups as well. “Most of the action happens within industries, where we see the big guys getting bigger and their markups increase,” De Loecker explains.

http://www.janeeckhout.com/wp-content/uploads/RMP.pdf

http://www.overcomingbias.com/2017/08/marching-markups.html
The authors are correct that this can easily account for the apparent US productivity slowdown. Holding real productivity constant, if firms move up their demand curves to sell less at a higher prices, then total output, and measured GDP, get smaller. Their numerical estimates suggest that, correcting for this effect, there has been no decline in US productivity growth since 1965. That’s a pretty big deal.

Accepting the main result that markups have been marching upward, the obvious question to ask is: why? But first, let’s review some clues from the paper. First, while industries with smaller firms tend to have higher markups, within each small industry, bigger firms have larger markups, and firms with higher markups pay higher dividends.

There has been little change in output elasticity, i.e., the rate at which variable costs change with the quantity of units produced. (So this isn’t about new scale economies.) There has also been little change in the bottom half of the distribution of markups; the big change has been a big stretching in the upper half. Markups have increased more in larger industries, and the main change has been within industries, rather than a changing mix of industries in the economy. The fractions of income going to labor and to tangible capital have fallen, and firms respond less than they once did to wage changes. Firm accounting profits as a fraction of total income have risen four fold since 1980.

...

If, like me, you buy the standard “free entry” argument for zero expected economic profits of early entrants, then the only remaining possible explanation is an increase in fixed costs relative to variable costs. Now as the paper notes, the fall in tangible capital spending and the rise in accounting profits suggests that this isn’t so much about short-term tangible fixed costs, like the cost to buy machines. But that still leaves a lot of other possible fixed costs, including real estate, innovation, advertising, firm culture, brand loyalty and prestige, regulatory compliance, and context specific training. These all require long term investments, and most of them aren’t tracked well by standard accounting systems.

I can’t tell well which of these fixed costs have risen more, though hopefully folks will collect enough data on these to see which ones correlate strongest with the industries and firms where markups have most risen. But I will invoke a simple hypothesis that I’ve discussed many times, which predicts a general rise of fixed costs: increasing wealth leading to stronger tastes for product variety. Simple models of product differentiation say that as customers care more about getting products nearer to their ideal point, more products are created and fixed costs become a larger fraction of total costs.

Note that increasing product variety is consistent with increasing concentration in a smaller number of firms, if each firm offers many more products and services than before.

https://niskanencenter.org/blog/markups-market-power/
http://marginalrevolution.com/marginalrevolution/2017/08/robin-hansons-take-rising-margins-debate.html

https://growthecon.com/blog/Markups/

Variable costs approach zero: http://www.arnoldkling.com/blog/variable-costs-approach-zero/
4. My guess is that, if anything, the two-Jan’s paper understates the trend toward high markups. That is because my guess is that most corporate data allocates more labor to variable cost than really belongs there. Garett Jones pointed out that these days most workers do not produce widgets. Instead, they produce organizational capital. Garett Jones workers are part of overhead, not variable cost.

Intangible investment and monopoly profits: http://marginalrevolution.com/marginalrevolution/2017/09/intangible-investment-monopoly-profits.html
I’ve been reading the forthcoming Capitalism Without Capital: The Rise of the Intangible Economy, by Jonathan Haskel and Stian Westlake, which is one of this year’s most important and stimulating economic reads (I can’t say it is Freakonomics-style fun, but it is well-written relative to the nature of its subject matter.)

The book offers many valuable theoretical points and also observations about data. And note that intangible capital used to be below 30 percent of the S&P 500 in the 70s, now it is about 84 percent. That’s a big increase, and yet the topic just isn’t discussed that much (I cover it a bit in The Complacent Class, as a possible source of increase in business risk-aversion).

...

Now, I’ve put that all into my language and framing, rather than theirs. In any case, I suspect that many of the recent puzzles about mark-ups and monopoly power are in some way tied to the nature of intangible capital, and the rising value of intangible capital.

The one-sentence summary of my takeaway might be: Cross-business technology externalities help explain the mark-up, market power, and profitability puzzles.

Why has investment been weak?: http://marginalrevolution.com/marginalrevolution/2017/12/why-has-investment-been-weak.html
We analyze private fixed investment in the U.S. over the past 30 years. We show that investment is weak relative to measures of profitability and valuation — particularly Tobin’s Q, and that this weakness starts in the early 2000’s. There are two … [more]
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march 2016 by nhaliday

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