The SMS conference reminds me of a long-standing puzzle. We have known for decades that investors value growth in earnings – because they either get rising dividends or a rising stock price they can sell on. Profitability – return on sales or on assets – is only of interest insofar as it enables future earnings growth. So how come the strategy field is obsessed with ‘explaining’ why some firms are more profitable than others, when investors aren’t interested and management does ...