Question

What according to Keynesian economists are the factors that lead to rigidities in wages and price

Answer 1

Keynesian  told that money wage rate is cause for unemployment of labour. The workers become disappointed because of not getting proper money for their work. So they don't given effort to do work then they leave the job and in society increase the unemployment. Money wags don't change the unemployment of labour. It doesn't fulfill the employment opportunities

Answer 2

According to Keynes, due to money wage rigidity, that is, downward .money wages, Keynes gave three reasons for the stickiness of money wage rate.
The workers become disappointed because of not getting proper money for their work. So they don't given effort to do work then they leave the job and in society increase the unemployment. Money wags don't change the unemployment of labour. It doesn't fulfill the employment opportunities.