Many questions. Hope you can answer one or more:
(a) What is it that masters programs addmission comitees are looking for in applicants? What are the most important variables they consider?
( Is research experience important?
© Can letters of recommendation be from economists as well as non-economists (but justified why him/her)?
(d) How hard is it to get to a competitive MA program like LSE, UoT, BGSE, UCL? Are minimun requirements a good guide, or are they are looking for something additional too (as with PhD's)?
Do American citizens have better chances of getting admitted than non Americans (other things equal)?