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) -- Over the years, many things have been wrongly cited as inflation drivers. High resource costs, low unemployment, high oil prices, extreme weather and even an economy with healthy demand have been falsely accused at times.

That list of unwarranted scapegoats got a new member last week, when an IMF report suggested inflation may be tied to ... inflation expectations.

Here's the logic. According to the report, because people generally have confidence in their central bank's ability to meet its self-imposed inflation target over time, future inflation expectations are more a function of the central bank's target than the current inflation rate, and this is somehow a self-fulfilling prophecy. And, as a corollary, when inflation expectations become "disanchored" from the target -- when expectations are materially higher -- that, too, is self-fulfilling.

Problem is, this assumes inflation is always and everywhere a psychological phenomenon. Yet evidence overwhelmingly shows inflation is a monetary phenomenon -- too much money chasing too few goods.

Also see: Bank of Japan Revamps Policy to Boost Economy >>

Inflation's driven by money supply, money velocity and the supply of goods and services, and none of those is a psychological thing. Money supply is driven largely by central banks and cross-border capital flows. Money velocity is largely a function of bank lending -- if banks lend more, businesses have more capital to spend on new technology, equipment and the like, and that money gets re-spent again and again. If banks lend less, money moves more slowly. The third variable, supply of goods and services, is also fundamental. Infrastructure bottlenecks, import caps, price controls and the like can all cause supply shortages, which drive prices higher.

Brazil provides a timely example of this. In recent months, supply chain bottlenecks, fuel and energy price controls, import restrictions and high industry-specific taxes have hurt production, broadly limiting the supply of goods available.

Compounding matters, the government's haphazard efforts to boost the economy -- currency intervention, "Buy Brazilian" policies, forcing down bank lending rates and offering one-off tax incentives for various industries -- have stymied private investment.

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Firms have tried to get by with productivity gains instead of expanding their operations, but now they seem to have reached the limit, and capacity utilization is stretched.

And on the money-supply side, in an effort to sustain consumer spending, the government has offset slower private bank lending with a massive increase in lending from state-run banks, pushing excess money into the economy. Too much money is chasing too few goods, and inflation's on the rise. This is driven by tangible factors, not broad psychology.

The upshot of the IMF's theory is that we needn't fear higher inflation from the U.S., U.K. and Japan's massive quantitative easing (QE) efforts. We'd largely agree with that conclusion -- higher inflation doesn't appear likely in the near term even though the monetary base has risen tremendously in each of those nations.

But this isn't because broad expectations are tame. Rather, it's because the new money isn't doing much chasing. In all three nations, most of the QE money is sitting at the central banks as excess reserves instead of circulating through the broader economy.

As long as money's idle, it can't really chase prices higher. If banks were to start lending more enthusiastically that would change, but for the moment, there seems to be little fundamental support for higher lending.

Regulators in the U.K. and U.S. are incentivizing banks to hoard capital, Japanese businesses don't have much appetite for investment, and QE has flattened all three nations' yield curves, reducing banks' net interest margins.

Until those issues resolve, QE likely doesn't have much impact on inflation (or, unfortunately, economic growth). Regardless of what "expectations" might say.

This article was written by an independent contributor, separate from TheStreet's regular news coverage.

This commentary comes from an independent investor or market observer as part of TheStreet guest contributor program. The views expressed are those of the author and do not necessarily represent the views of TheStreet or its management.