Help with estimation method


New Member
I have a dataset as follows:
There are n individuals. Each individual has a fixed amount of money spent on a basket of three goods A, B, C. They have different choices of the proportion of the money spent on each good. The dependent variable is described as follows:
Inds. A B C Total
1 20% 50% 30% 100%
2 50% 10% 40% 100%
3 25% 25% 50% 100%
n 10% 75% 15% 10%
I want to investigate the impacts of demographic attributes on this choice.
Please tell me what kinds of estimation method (e.g., logistics, OLS,…) that can be used to estimate this model.