in addition the higher up the pay scale the greater the differences in career opportunities and compensation while on average the gross wage gap in oecd countries stands at in switzerland as noted for top earners it rises to in oecd countries and in switzerland oecd a women also make up a small percentage of company board members in switzerland for the largest firms versus a european average of egon zehnder and entrepreneurs defined as persons taking on the risk of setting up a business the gender wage gap is calculated as the difference between median earnings of m median eamings of men for the netherlands