- #36
talk2glenn
mheslep said:That flys in the face of the data reference. Classical Phillips accurately predicts very little correctly _as the data clearly shows_. That's a direct contradiction of your first sentence.
No curve will capture every possible data point. They are always estimates. The estimate is useful to the extent that it captures the trends in the data.
The 2nd graph is simply inflation and employment data over time, showing unemployment and inflation over time.
The black line was actual data. The red line was estimated positions for the Phillips curves. Note that they move. The data set doesn't invalidate the principle; it demonstrates that rapid changes in macroeconomic conditions can affect the curves positioning.
Source? I think you meant to say dependency and/or connection, not dichotomy, and the 'policy makers' don't 'recognize' inflation as a means of driving unemployment any more
Of course they do. This is one of the most elementary rules of monetary policymaking - short term changes in unemployment away from equilibrium will result in higher inflation, and vice versa.
http://en.wikipedia.org/wiki/Phillips_curve#The_Phillips_curve_today
However, this long-run "neutrality" of monetary policy does allow for short run fluctuations and the ability of the monetary authority to temporarily decrease unemployment by increasing permanent inflation, and vice versa.
The stagflation of the mid 70's which simply the most striking counter Phillips example. But also shown above are several periods where inflation increased but so did unemployment, or the converse was true (decreasing inflation and unemployment), both of which are contrary to classical Phillips. Look, I've provided respectable economic references and you are directly contradicting them with assertion. Let's see some references.
The stagflation of the 70's is not a counter-example to the Phillips curve. It is generally believed today that the market "priced in" expectations about future high inflation and high unemployment. This moved the Phillips curve up and to the right. The result was higher permanent inflation rates for the same level of employment.
Today, the Phillips curve is modified from its original form to "price in" expectations about inflation and employment rates. When those expectations change, the curve changes. The original curve responded only to actual employment and inflation rate changes.