PepsiCo reported mixed second quarter results, with earnings beating estimates but revenue missing targets as demand weakened in North America. Volume declined at Frito-Lay North America and for Pepsi's North American beverage unit, reflecting softening consumer demand. Quaker Foods North America saw its volume fall due to recalls earlier in the year that continue to impact sales. Executives said consumers have become more value-conscious and price-sensitive in North America after years of price hikes. The company is focusing on higher-margin packs and products along with promotions to attract thriftier shoppers. Pepsi narrowed its full-year revenue growth outlook.