How much average value does 1 working hour produce? ( are there reliable statistics?) This is a non-economist's question. 

As a philosophy teacher ( in a french high school) , I have to study the theme of " labour" in class. I'm looking for factual data in order to assess the contemporary validity of some philosophical theories regarding the employee/ enterprise relation. 



I suppose there is no single answer to the question : how much average value does 1 working hour produce? 

Are there reliable statistics dealing with this subject? 

Either statistics by country, or by enterprise, or by social category/profession? 

Has also the profit generated by 1 working hour been studied? 

Has the historical evolution of this profit through time been investigated?
One possible measure is "GDP (or productivity) per hour worked": OECD, EU28.