Thirty-nine percent of Cambodia's consumers are less optimistic than six months ago, according to a survey by Indochina Research. It selected 600 people each in Cambodia, Vietnam and Laos in January to gauge buying behaviour. Cambodia was second of the three countries with 27 percent giving a positive response and 25 percent saying the situation was unchanged. Laos was the most optimistic with 61 percent favourable, while among Vietnamese, 46 percent were less optimistic than before, the data showed.