Malus sieversii modern apple cultivars. Unlike domesticated varieties its leaves go red in autumn: 62.2% of the trees in the wild do this compared to only 2.8% of the regular apple plant or the 2,170 English cultivated varieties. The species is now considered vulnerable to extinction. "Malus sieversii" has previously been identified as the main contributor to the genome of the cultivated apple ("Malus pumila"), on the basis of morphological, molecular, and historical evidence. A DNA analysis in 2010 confirmed "M. sieversii" as the progenitor of the cultivated apple. A third species that has been thought to have made contributions to the
Bonus-malus in early years) but with long-term losses (which, under a traditional bonus system, would not be penalized). Such a system was proposed by Raghuram Rajan in January 2008. Author Jim Collins proposed that executives be expected to buy stock with their own money (as was done at IBM in the 1990s) taking on both up-side rewards and down-side risk. In November 2008, UBS AG announced a change to its executive compensation scheme implementing such a system, which it dubbed a "bonus-malus" system. In France, the prices of insurance are calculated as function of the car type, subscribed insurance options, and