Coalition Types and Economic Reform

Can coalition governments in India be stable? And if so, can they undertake economic reforms and, more generically, policies that have short-term political costs but only long-term benefits? And if they do so, can they remain stable? The withdrawal from the United Progressive Alliance (UPA) coalition government of its second-largest constituent, the Trinamul Congress of West Bengal led by Mamata Banerjee, in September 2012, over policy announcements of reduction of fuel subsidies to tackle the fiscal deficit and liberalization of foreign direct investment, sharply poses these questions.