31. Regifting has become a popular addition to many white elephant gift exchanges or yankee swap events. 32. The gift exchange was a first for the Lakers, and Jackson seemed pleased at their response. 33. The gift exchange also could be a violation of securities regulations, people on Wall Street said. 34. In " gift exchange " models firms pay high wages to increase productivity through improved worker morale. 35. There are no gifts exchanged ; that takes place on Three Kings Day _ January 6, he said. 36. In addition, companies in Singapore usually arrange gift exchange programs on the last working day before Christmas. 37. During a gift exchange between the two leaders, Bush gave Putin a belt with the presidential seal. 38. People began picking from the pile and opening the presents and having a makeshift Christmas gift exchange . 39. It's the world's most ingenious gift exchange . 40. Social norms and custom govern gift exchange .