Anchors Aweigh!


I think it is time to talk a little bit about “anchored inflation expectations.”

Key to a lot of the inflation modeling at the Fed, and in some sterile economics classrooms around the country, is the notion that inflation is partially shaped by the expectations of inflation. Therefore, when people expect inflation to remain down, it tends to remain down. Thus, you often hear Fed officials talk about the importance of inflation expectations being anchored, and that phrase appears often in Federal Reserve statements and minutes.

I have long found it interesting that with as much as the Fed relies on the notion that inflation expectations are anchored, they have no way to accurately measure inflation expectations. Former Fed Chairman Bernanke said in a speech in 2007 that three important questions remain to be addressed about inflation expectations:

  1. How should the central bank best monitor the public’s inflation expectations?
  2. How do changes in various measures of inflation expectations feed through to actual pricing behavior?
  3. What factors affect the level of inflation expectations and the degree to which they are anchored?

According to Bernanke, the staff at the Federal Reserve struggle with even the first of these questions (“while inflation expectations doubtless are crucial determinants of observed inflation, measuring expectations and inferring just how they affect inflation are difficult tasks”), although this has not deterred them from tackling the second and third questions. Economists use the Hoey survey, the Survey of Professional Forecasters, the Livingston survey, the Michigan survey, and inflation breakevens derived from the TIPS or inflation swaps markets. But all of these suffer from the fundamental problem that what constitutes “inflation” is a difficult question in itself and answering a question about a phenomenon that is hard to quantify viscerally probably causes people to respond to surveys with an answer indicating what they expect the well-known CPI measure to show. I talked about many of these problems in my paper on measuring inflation expectations (“Real-Feel” Inflation: Quantitative Estimation of Inflation Perceptions), but the upshot is that we don’t have a good way to measure expectations.

So, with that as background, consider this fact: next year, some Medicare participants will face a 0% increase in premiums while some Medicare participants will face increases of more than 50%.

I am skeptical of the notion of inflation anchoring. But I am really skeptical if it is the case that different segments of the population see totally different inflation pictures. Which anchor counts, if one large group of people expects 7% inflation and another large group expects 1% inflation?

I would argue that none of those anchors matter, because the whole notion is silly. Let’s think through the mechanism of “inflation anchoring.” So the idea is that when people expect lower inflation, they make decisions that tend to produce lower inflation. What decisions are those? If you expect 1% inflation, but Medicare costs go up 50%, what decision are you going to make that will cause that increase to be closer to your expectations? If eggs go up 25 cents per carton and you were expecting 5 cents…is the idea that no one will buy eggs and so the vendor will have to lower the price? What about his costs? Pretty clearly, the mechanism will have to work on the seller’s side, but since every seller is a buyer except for the original seller of labor, the idea must be that if people expect high inflation they argue for higher wages, which causes prices to rise.

Aha.

I have put paid to that notion in this space before. It doesn’t make any sense to think that wages lead inflation, for if they did then we would all love inflation because we would always be ahead of it. But we know that’s not how it works – prices rise, and then we get higher wages. And sometimes we don’t.

Let’s try another hypothetical. Suppose the Federal Reserve literally drops $50 trillion, unexpectedly, from helicopters. And suppose that consumers did not change their expectations for inflation because they believed, much like the Fed does, that money doesn’t play a role in causing inflation – in other words, their expectations were “extremely well-anchored.” Does anyone think that the price level wouldn’t change, a lot, in contrast to the expectations of the crowd? (I sometimes wonder if Lewis Carroll’s Red Queen, who “sometimes…believed as many as six impossible things before breakfast,” was a Fed economist.)

The whole idea that inflation expectations matter is an effort to explain why parameterizations of inflation models have a regime break in the early 1990s. That is, you can fit a model to 1970-1992, or to 1994-present, but you need different parameters for almost anything you try in the Keynesian-modeling world. Econometricians know that outcome means that you are missing an explanatory variable somewhere; econometricians also know that a very convenient way to gloss over the problem is to introduce a “dummy” variable. In this case, the dummy variable is explained as “inflation expectations became anchored in the early 1990s.”

With all of the problems affecting the notion of expectations-anchoring, I find this solution to the modeling problem deeply unsatisfying. I do not believe that inflation expectations anchor for everybody collectively, but that different groups of people have different (and widely different) anchors. And I don’t think that these anchors themselves play much of a role at all in causing a certain level of inflation. There are better models, simpler models, which do not require you to believe six impossible things.

Unfortunately, they do require you to believe in monetarism. And to some people, that is a seventh impossible thing.

Advertisements
  1. Philippe Roger
    October 19, 2015 at 11:22 pm

    Very interesting post thank you. I am no inflation expert at all, so forgive these naive comments. I have always struggled with the concept of inflation, of “one inflation”. Surely, the inflation perception depends on your level of income. Some goods may have fallen in prices but many can’t afford it. Is therefore inflation perceived as high or low? The whole debate and fear about deflation this year and last left me quite puzzled. I have been thinking, how do some people react to the headline that inflation is alarmingly low and needs to be kicked higher? To me, it would be interesting to look at baskets defined by relevance to different level of income. This train of thoughts apply as well to inflation expectations. Anyway, again, not something I pretend to understand in depth but I’m reading your posts with much interest. Thank you.

    Sent from my iPhone

    >

    • October 20, 2015 at 10:14 am

      Good thought. I don’t think the BLS does this (although they do have a ‘retiree’ CPI), but it’s not hard to do…once I roll out my CPI calculator you’ll be able to construct such an index based on your own assessments of the relevant weights in “necessaries” as opposed to “can’t-afford luxuries.”

  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: