This paper proposes a two-equation price-wage model that enables to te
st whether the inflationary pressure on wage rate is only present when
the rate of inflation is greater than some threshold value. Since the
likelihood function for this model is very nonstandard, we develop a
small-sample Bayesian approach to estimate its parameters. Our empiric
al results for Poland, 1962-1993, give support to the hypothesis of th
e price-wage spiral with a positive threshold value of inflation.