" We found that across the 15 categories , positive wom was more common than negative by an factor of 3 to 1 , " says prof east .
伊斯特教授表示:“我们发现,在所有15个消费类别中,好口碑比坏口碑更常见,比例为3比1。”
Estimates from the var model show that wom referrals have substantially longer carryover effects than traditional marketing actions and produce substantially higher response elasticities .
Mr marsden and his colleagues found that companies with a poor balance of positive to negative wom in this study , lloyds-tsb , j. sainsbury , and t-mobile grew more slowly than their competitors over the period studied .