President Miloš Zeman has appointed economist Jiří Rusnok to succeed Petr Nečas as prime minister of the Czech Republic. Mr. Rusnok will head a caretaker cabinet. Aged 52, he was finance minister under then PM Zeman in the early 2000s before serving as minister of industry and trade. However, Mr. Rusnok’s government may find it difficult to win a vote of confidence in the Chamber of Deputies.