What I tried to explain is not about fluctuation or randomness. Stability in the trends of salaries is no surprise.
I just draw a line between "correlation" and "causation", as Duncan also has rightly recognised in his previous post.
To clarify, let's take an off-the-topic and perhaps extreme example: If you try to analyze the difference between the average wealth levels of "native English speakers" and "native-say-Zimbabwean speakers", most probably you will find that native English speakers are far better off. Based on this, could you come to a conclusion like "native English speakers are better off because of the language they speak"?
Of course, in the case of graduate salaries, universities are not irrelevant as opposed to the example above, however we should still need to consider other possible independent factors that may have an impact on the graduate salaries for a more complete analysis. For example;
- Is there a significant difference between the geographic locations where the graduates of these two universities generally work?
- Is there a significant difference between the industries in which the graduates of these two universities generally work?
- Are there differences in the course ranges of these universities?
-...so on.
Before coming to a conclusion about causation, I would prefer to increase the depth and breadth of my analysis, that is what I say. In the end, you may again find that perhaps it seems only the university that matters, but in this case the analysis would be a more reliable one.
Anyway, if you are satisfied with the comparision of graduate salaries, then of course you may well continue with it.
Regards,
What I tried to explain is not about fluctuation or randomness. Stability in the trends of salaries is no surprise.
I just draw a line between "correlation" and "causation", as Duncan also has rightly recognised in his previous post.
To clarify, let's take an off-the-topic and perhaps extreme example: If you try to analyze the difference between the average wealth levels of "native English speakers" and "native-say-Zimbabwean speakers", most probably you will find that native English speakers are far better off. Based on this, could you come to a conclusion like "native English speakers are better off because of the language they speak"?
Of course, in the case of graduate salaries, universities are not irrelevant as opposed to the example above, however we should still need to consider other possible independent factors that may have an impact on the graduate salaries for a more complete analysis. For example;
- Is there a significant difference between the geographic locations where the graduates of these two universities generally work?
- Is there a significant difference between the industries in which the graduates of these two universities generally work?
- Are there differences in the course ranges of these universities?
-...so on.
Before coming to a conclusion about causation, I would prefer to increase the depth and breadth of my analysis, that is what I say. In the end, you may again find that perhaps it seems only the university that matters, but in this case the analysis would be a more reliable one.
Anyway, if you are satisfied with the comparision of graduate salaries, then of course you may well continue with it.
Regards,