Again:

The Cult of "Price Stability" Is Killing American Workers by Yglesias

Sticky (economics)

What has surprised Krugman and Jane Yellin lately is the extent of downward nominal wage rigidity.

Real rigidity

Krugman:

Why Are Wages Still Rising? (Wonkish)  (7.9.11)

Mysteries Of Deflation (Wonkish) (7.26.10)

Internal Devaluation, Inflation, and the Euro (Wonkish) (7.29.12)

Sticky Wages and the Macro Story  (7.22.12)

Nominally Legal  (7.12.12)

Pointless Pain in Spain (7.11.12)

Revenge of the Optimum Currency Area  (6.24.12)

Still more, searching NYTimes for downward nominal wage rigidity.