I think accreditations and rankings exist to avoid endless discussions based on opinions rather than facts. We could discuss forever, but I prefer to focus on objective facts, and the truth is there are five internationally accredited schools in Spain: Instituto de Empresa, IESE, ESADE, EADA and Carlos III. Accreditation is not subjective: it involves serious external auditing by deans or directors of other accredited schools, usually from other countries. All five schools, with their strengths and weaknesses, are serious and offer high-quality programs. Otherwise they wouldn't be accredited.
In terms of rankings, four of them (the first ones) appear in the international rankings, although they do not all appear in all rankings. Everyone can check how those rankings are made and see where each school stands. Rankings however vary because they don't give the same importance to all aspects of an MBA, they don't survey the same people, etc.
The FT ranking is mostly focused on post-MBA salaries (20%), salary increases (20%), alumni opinions (19%), and the quality of faculty (20%). According to this ranking, you would have IE first, then IESE, then ESADE, and last EADA. Carlos III is too young to get into the rankings.
The Business Week approach is different. It focuses more on the quality of the programs rather than the salaries (quite different from FT which gives a lot of importance to salaries). Also, the BW ranking relies on surveys of employers and alumni, whereas FT does not survey employers. According to BW, there's ESADE, then IESE. I think IE and EADA are not ranked.
The Economist's ranking is again different: it does not survey employers --only alumni and schools. In terms of criteria it is kind of in between FT and BW: salaries are important, but not as important as in FT, and the quality of the program plays a more important role than in FT. According to that ranking, there's IESE, then IE, then ESADE and EADA.
The Wall Street Journal's ranking is based on employers' opinions only. It does not directly evaluate the quality of the program, it does not ask alumni. In that case there's ESADE first, then IE, and then IESE.
One last comment. Given that most people first decide to come to Spain and then choose the program, you should take into account that those schools (and often their alumni) view themselves as direct competitors. Unfortunately, such competition often leads people to despise programs that are not their own. That's why I think it is important to focus on objective data.
I think accreditations and rankings exist to avoid endless discussions based on opinions rather than facts. We could discuss forever, but I prefer to focus on objective facts, and the truth is there are five internationally accredited schools in Spain: Instituto de Empresa, IESE, ESADE, EADA and Carlos III. Accreditation is not subjective: it involves serious external auditing by deans or directors of other accredited schools, usually from other countries. All five schools, with their strengths and weaknesses, are serious and offer high-quality programs. Otherwise they wouldn't be accredited.
In terms of rankings, four of them (the first ones) appear in the international rankings, although they do not all appear in all rankings. Everyone can check how those rankings are made and see where each school stands. Rankings however vary because they don't give the same importance to all aspects of an MBA, they don't survey the same people, etc.
The FT ranking is mostly focused on post-MBA salaries (20%), salary increases (20%), alumni opinions (19%), and the quality of faculty (20%). According to this ranking, you would have IE first, then IESE, then ESADE, and last EADA. Carlos III is too young to get into the rankings.
The Business Week approach is different. It focuses more on the quality of the programs rather than the salaries (quite different from FT which gives a lot of importance to salaries). Also, the BW ranking relies on surveys of employers and alumni, whereas FT does not survey employers. According to BW, there's ESADE, then IESE. I think IE and EADA are not ranked.
The Economist's ranking is again different: it does not survey employers --only alumni and schools. In terms of criteria it is kind of in between FT and BW: salaries are important, but not as important as in FT, and the quality of the program plays a more important role than in FT. According to that ranking, there's IESE, then IE, then ESADE and EADA.
The Wall Street Journal's ranking is based on employers' opinions only. It does not directly evaluate the quality of the program, it does not ask alumni. In that case there's ESADE first, then IE, and then IESE.
One last comment. Given that most people first decide to come to Spain and then choose the program, you should take into account that those schools (and often their alumni) view themselves as direct competitors. Unfortunately, such competition often leads people to despise programs that are not their own. That's why I think it is important to focus on objective data.