Bloomberg In China’s manufacturing heartland Guangdong, clock maker Dannol Electronics Co. is grappling with higher input costs stemming from tougher environmental regulations. Already squeezed by years of rising wage bills and intensifying domestic competition, the company recently increased asking prices by an average of 15 percent for new customers and plans to do the same with older buyers soon. …

  Bloomberg Warren Buffett’s Berkshire Hathaway Inc. said fourth-quarter profit rose 15 percent, fueled by a gain on an investment in Dow Chemical Co. Net income increased to $6.29 billion, or $3,823 a share, from $5.48 billion, or $3,333, a year earlier, the Omaha, Nebraska-based company said in a statement. Operating earnings, which exclude some investment results, were $2,665 a …

  Bloomberg One of Mexico’s largest business groups is working on a bargaining chip ahead of talks to renegotiate the North American Free Trade Agreement: finding alternatives to the US for grain imports. The Consejo Coordinador Empresarial, one of the nation’s top business chambers, is examining countries such as Brazil and Argentina to add new sources for soy, corn and …