5101.2 Assessment
Research Question (Clear, unambiguous) "I want to study the charitable giving patterns of Millennials alongside their incentives for visiting arts institutions to understand if there is a correlation between the changes in the motivations of the younger generation to engage in philanthropy and the motivations driving interest in arts institutions."  This seems interesting on the surface, but it is somewhat ambiguous and problematic.  "Motivations" is inherently vague and difficult to study even if made more precise.  "Change" can only be studied with data from different points in time.  Cross sectional correlations across people do not tell us about correlations across time.  
Relevant Literature Neglected, although reports results from a study that (from a glance) used online surveying (poor sampling) and did not report methodology.
Causal Interpretations (clear, all parts defined, mechanisms, controls, plausible) Does not really offer a causal interpretation, beyond the obscure idea that generations differ.  If the opening statement that the "the demographic of art museum-goers seems to remain stubbornly steadfast" it is unclear what is being explained - explaining a constant is rather difficult.  If the goal is to "explain" philanthropy, then we need a design that considers all the relevant influences.
Data (variables, sample, comparison) The paper does not state what data it intends to use, but its references to the GSS suggest it might be that.  You might also want to visit the National Archive of Data on Arts and Culture (NADAC) online and look over what is available there.  The GSS may be appropriate for looking at the relationships between attitudes, but in general findings on the relationships between attitudes are not very trustworthy.
Research Value Neglected.  Not obvious, beyond making cultural commentaries.
Overall The explanations of both philanthropy and participation in the arts are of general interest, but the aim here is a bit illusive.  It seems obvious that those who contribute to the arts will generally also participate in the arts.  It is also obvious that charitable giving is a function of income and wealth.  A long line of research shows class variation in leisure time activities (e.g., more museums and theatre for the affluent, more sports and popular must for the less affluent).  Not clear how this takes off from that.