Richard Layard said: "My belief is that the best state of society is the one where there is the most happiness and the least misery. And if we think happiness is what policymakers should aim for, it...

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Extracted text: Richard Layard said: "My belief is that the best state of society is the one where there is the most happiness and the least misery. And if we think happiness is what policymakers should aim for, it is critical to measure it." (The Guardian, 20 July 2012) How can happiness be measured? What are the problems of these measures? Discuss the reliability of happiness measures using examples.