How do I apply the appropriate model to determine if the presence of women in a corporate board influence the financial transparency of financial statements?
Well.. @dragos.. I have built my case on the financial crisis and corporate scandals.. and the fact that women are whistle blowers. Also,studies do show that diversitymakes the board more effecient by eliminating group think mentality -a cause for the corporate scandals
You have to find a proxy for gender diversity and here i suggest using the following:
Two measures of gender diversity that take into account both the number of gender categories, in this case two i.e. women and men, and the evenness of the distribution of board members in boardrooms.
These two attributes of diversity, referred to as `variety' and `balance', respectively,
may be combined into `dual concept' measures of diversity. These two measure falling in this category are the Blau and Shannon diversity indexes .
For financial transparency, you may use Transparency level(TL), taking the value of 1 if more transparent companies and 0 otherwise.
Then you build up your model as
TL=alpha+beta1(Blau index)+ beta2(Shannon index)+error term
In this case you have to consider your data as panel data (50 companies x 5 years= 250 observations) and use OLS in addition to fixed effect and random effect. If your data has tails, then you may use generalised method of moments (GMM).
K Rao,C Tilt, "Board composition and corporate social responsability: The role of diversity, gender, strategy and decision making", Journal of Business Ethics, 2016, 138, p 327 -347.
Just for the discussion section of your study: I am sceptical whether gender diversity can increase board effectiveness and financial statement transparency just because of the gender. We should pay more attention to the circumstaces at place. Please consider this anecdotical evidence:
I am sure that you are familiar with the German carmaker Volkswagen. Well, the wife of the highly controversial board chairman served at the board, too, which caused further controversy, because of her professional background as a nursery teacher (by the way, Volkswagen's total sales in 2015 were over 213 Billion Euro and it employed over 610.000 employees - these are numbers a nursery teacher usually does not deal with). No doubt, she increased gender diversity of the Volkswagen board, but did she really contribute to financial statement transparency? Perhaps we should pay more attention to the directors' educational and professional background in order to achieve meaningful results.
For education, you may consider splitting the sample into those with business degree and others. For the level of education, you may go with those with MSc, MBA,..etc.
I know the data is difficult to collect, but BoardEx may have the data (http://corp.boardex.com/data/). I can send you a paper on this if you wish.