Procter & Gamble Co. will report its first-quarter earnings Wednesday before the market opens. Prior to the announcement, analysts are wondering if the company can keep building sales while spending on heavier marketing, innovation, and discounts or lower-priced product versions to keep budget-watching shoppers buying its big-name brands such as Pampers diapers and Tide laundry detergent. Among summer launches were the Gillette ProGlide razor and Gain dishwashing liquid, which ...