a) By a general economic law there cannot be two market prices. 
The wages of 1,000 workers of the same skill are determined not by 
the 950 in employment but by the 50 unemployed. Influence of the 
Trish on the position of the English workers and of the Germans on the 
position of the Alsatian workers. 

b) The workers compete with each other not merely by one 
offering himself more cheaply than another, but by one doing the 
work of two. 

Advantages of the unmarried over the married worker, etc. 
Competition between workers from villages and towns.