飿ååºãé貨å±ãªã©ã訪ããéãåºå¡ããã³ã¼ãã¼ã®ãµã³ãã«ã試ä¾åãã¡ãã£ã¨ãããèåãªã©ãåãåã£ããã¨ãããããããã¾ããããããã親åã¯å¿ã温ã¾ããã®ã§ãããæ°ããªç ç©¶ã«ãããæ¡ä»¶ãªãã§ç¡æãã¬ã¼ã³ãããããã¨ãåºã§ã®æ¯åºãå¢å ãããã¨ãããã¨ãæããã«ãªãã¾ããã The effects of unconditional gifts on customer-firm relationships | Journal of the Academy of Marketing Science | Springer Nature Link https://link.springer.com/article/10.1007/s11747-025-01129-x Free gifts with no strings attached can boost customer spending by


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