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May 10, 2014

Latest Posts from Economist's View

Latest Posts from Economist's View


'How Has Disability Affected Labor Force Participation?'

Posted: 10 May 2014 12:24 AM PDT

Dave Altig and Ellyn Terry at macroblog:

How Has Disability Affected Labor Force Participation?: You might be unaware that May is Disability Insurance Awareness Month. We weren't aware of it until recently, but the issue of disability—as a reason for nonparticipation in the labor market—has been very much on our minds as of late. As we noted in a previous macroblog post, from the fourth quarter of 2007 through the end of 2013, the number of people claiming to be out of the labor force for reasons of illness or disability increased almost 3 million (or 23 percent). The previous post also noted that the incidence of reported nonparticipation as a result of disability/illness is concentrated (unsurprisingly) in the age group from about 51 to 60.
In the past, we have examined the effects of the aging U.S. population on the labor force participation rate (LFPR). However, we have not yet specifically considered how much the aging of the population alone is responsible for the aforementioned increase in disability as a reason for dropping out of the labor force.
The following chart depicts over time the percent (by age group) reporting disability or illness as a reason for not participating in the labor force. Each line represents a different year, with the darkest line being 2013. The chart reveals a long-term trend of rising disability or illness as a reason for labor force nonparticipation for almost every age group.
Percent of Age Group Reporting Disability or Illness as the Reason for Not Participating in the Labor Market
The chart also shows that disability or illness is cited most often among people 51 to 65 years old—the current age of a large segment of the baby boomer cohort. In fact, the proportion of people in this age group increased from 20 percent in 2003 to 25 percent in 2013.
How much can the change in demographics during the past decade explain the rise in disability or illness as a reason for not participating in the labor market? The answer seems to be: Not a lot.
Following an approach you may have seen in this post, we break down into three components the change in the portion of people not participating in the labor force due to disability or illness. One component measures the change resulting from shifts within age groups (the within effect). Another component measures changes due to population shifts across age groups (the between effect). A third component allows for correlation across the two effects (a covariance term). Here's what you get:
Contribution to Change in the Portion of the Population Who Don't Want a Job Because They Are Disabled or Ill
To recap, only about one fifth of the decline in labor force participation as a result of reported illness or disability can be attributed to the population aging per se. A full three quarters appears to be associated with some sort of behavioral change.
What is the source of this behavioral change? Our experiment can't say. But given that those who drop out of the labor force for reasons of disability/illness tend not to return, it would be worth finding out. Here is one perspective on the issue.
You can find even more on this topic via the Human Capital Compendium.

Links for 5-010-19

Posted: 10 May 2014 12:06 AM PDT

Why Do Economists Still Disagree over Government Spending Multipliers?

Posted: 09 May 2014 09:24 AM PDT

Daniel Carroll:

Why Do Economists Still Disagree over Government Spending Multipliers?, by Daniel Carroll, Commentary, Cleveland Fed:  Public debate about the effects of government spending heated up after record-large stimulus packages were enacted to address the fallout of the financial crisis. Almost as noticeable as the discord was the absence of consensus among prominent economists on the issue. While it seems a simple problem to estimate the effect of government spending on output—the size of the government multiplier—it is anything but.

Paper here.

Economists and Methodology

Posted: 09 May 2014 09:18 AM PDT

Simon Wren-Lewis:

Economists and methodology: ...very few economists write much about methodology. This would be understandable if economics was just like some other discipline where methodological discussion was routine. This is not the case. Economics is not like the physical sciences for well known reasons. Yet economics is not like most other social sciences either: it is highly deductive, highly abstractive (in the non-philosophical sense) and rarely holistic. ...
This is a long winded way of saying that the methodology used by economics is interesting because it is unusual. Yet, as I say, you will generally not find economists writing about methodology. One reason for this is ... a feeling that the methodology being used is unproblematic, and therefore requires little discussion.
I cannot help giving the example of macroeconomics to show that this view is quite wrong. The methodology of macroeconomics in the 1960s was heavily evidence based. Microeconomics was used to suggest aggregate relationships, but not to determine them. Consistency with the data (using some chosen set of econometric criteria) often governed what was or was not allowed in a parameterised (numerical) model, or even a theoretical model. It was a methodology that some interpreted as Popperian. The methodology of macroeconomics now is very different. Consistency with microeconomic theory governs what is in a DSGE model, and evidence plays a much more indirect role. Now I have only a limited knowledge of the philosophy of science..., but I know enough to recognise this as an important methodological change. Yet I find many macroeconomists just assume that their methodology is unproblematic, because it is what everyone mainstream currently does. ...
... The classic example of an economist writing about methodology is Friedman's Essays in Positive Economics. This puts forward an instrumentalist view: the idea that realism of assumptions do not matter, it is results that count.
Yet does instrumentalism describe Friedman's major contributions to macroeconomics? Well one of those was the expectations augmented Phillips curve. ... Friedman argued that the coefficient on expected inflation should be one. His main reason for doing so was not that such an adaptation predicted better, but because it was based on better assumptions about what workers were interested in: real rather nominal wages. In other words, it was based on more realistic assumptions. ...
Economists do not think enough about their own methodology. This means economists are often not familiar with methodological discussion, which implies that using what they write on the subject as evidence about what they do can be misleading. Yet most methodological discussion of economics is (and should be) about what economists do, rather than what they think they do. That is why I find that the more interesting and accurate methodological writing on economics looks at the models and methods economists actually use...

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