Maybe, maybe not. I asked what evidence you had to support the assertion that it has been manipulated, and you haven't provided any. My "agenda" is to have a rational public policy based on an objective analysis of the available data. What's yours?
It doesn't matter who Nixon hand picked to do his study. Obviously they had their own agenda! Methodology be damned.
On that basis, there is no reason to do any research at all. Why waste money on research if you've already decided what the results should be, and will not accept any evidence to the contrary? It works for the environmentalists.
"Obviously" by what standard? Because the results didn't match up with your predetermined conclusion? Are you honestly stating that each of the dozens of independent studies that have determined no causal relationship between marijuana use and hard drug use "had their own agenda", and that only those that come to your personal conclusion are valid? Who has the agenda again?
The environmentalists are a good example! Like the proponents of legalizing drugs, environmentalists don't let the truth stand in their way when it comes to these so-called "studies." One common line of thought between the pro-drug movement, and environmentalists is that the end justifies the means!