My statistical knowledge is about 10 yrs out of date. At that time, their failure rate was around 3 per cent. My knowledge of their economic success comes from a BBC documentary in which an economist from the London School of Economics compared the productive efficiency of a $ of capital in Mondragon compared to ??? (the statistical average in a capitalist corporation?) and found Mondragon more effective.
All that work is outdated because it was done prior to Mondragon's globalization.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13