BANGKOK :Thailand's export growth in March was higher than February's 14 per cent annual rise, while tariff negotiations with the United States set for this week are expected to proceed positively, the commerce minister said on Monday. Pichai Naripthaphan said exports, a key driver of the Thai economy, would continue to grow if the negotiations went well. "I believe the outcome of the negotiations will likely be good and have a high chance of success," he told reporters, citing the strong