Nalyse the problems involved in identifying the impact of employee participation and involvement schemes on a companyas performance.

try to use ejounal and book as a resource rather than website.
There are two argument that I want you to add into the essay as well
Argument 1:
How do we know that it is the EPI that has say improved performance, rather than some other variable( eg, the success of a marketing campaign or an upturn in the economy)
Argument 2
It is possible EPI reduce performance (slow down decision-making or increasing labour costs