本研究旨在探討不同組合的日期標示，如何影響消費者對於易腐性食品的新鮮度判斷。我們認為，當消費者在判斷食物的新鮮度時，會受到製造日期標示(M)所影響，但是受到保存期限標示(L)或是到期日期標示(E)的影響效果卻不大。我們證實了，當食品是屬於接近製造日期時，有製造日期的標示組合(MLE, ML, and ME)，相較於沒有製造日期的標示組合(LE and E)，有較高的新鮮度評價。然而當食品已經過了一半時間，或甚至快接近到期時，消費者則是對於沒有製造日期的標示組合，比起有製造日期的標示組合，有較高的新鮮度感受。當面對同時有保存期限與到期日期的標示時(LE)，消費者在有推算出製造時間的情況下，新鮮度評價會與有製造日期資訊的標示組合相同(MLE = ML = ME = LE_推m)。反之，消費者在沒有推算出製造時間的情況下，新鮮度體會則是趨近於僅有到期日期標示(LE_無推m = E)。在任何時間下，知道製造日期的標示組合(MLE, ML, ME, and LE_推m)之間是呈現無差異的情形，同時不知道製造日期的標示組合(LE_無推m and E)彼此之間也無顯著的差別。

This study aimed to explore different combinations of date labeling that how to influence consumers those freshness judgment of perishable products. We believe that when consumers judge the freshness of perishable product will be subject to manufacture date (M) on the perishable product, but by the shelf life (L) or expiration date (E) the effect is not large. We show that when those perishable products are near manufacture time, consumers have higher freshness evaluations of perishable products with date of manufacture marked (ie., MLE, ML, and ME), compared with no date of manufacture marked (ie., LE and E).However, when perishable products are over half these times of product life cycles, or even approaching their expiration dates, consumers have higher evaluations of the perishable products with no date of manufacture marked, compared with date of manufacture marked. When consumers try to figure out the manufacture time of perishable product with shelf life and expiry date marked, their freshness evaluations are the same as the perishable products with manufacture date marked (ie., MLE =ML = ME = LE_figure out m ). On the contrary, if they don’t try to figure out the manufacture time of perishable product with shelf life and expiry date marked, their freshness evaluations are closer to only the expiration date marked (ie., LE_no figure out m = E). At any time, it is no different among the perishable products that consumers know manufacture dates (ie., MLE, ML, ME, and LE_figure out m), and it is also no different among the perishable products that consumers don’t know manufacture dates (ie., LE_no figure out m and E).

Bowen Deborah, Pamela Green, Nancy Vizenor, Cathy Vu, Petra Kreuter, and Barbara Rolls (2003), “Effect of Fat Content on Fat Hedonics：Cognition or Taste ?,” Physiology and Behavior, 78 (2), 247-253.
Cardello, Armand V. and Howard G. Schutz (2003), “The Concept of Food Freshness: Uncovering Its Meaning and Importance to Consumers,” in Freshness and Shelf Life of Foods, ed. Keith R. Cadwallader and Hugo Weenan, Washington, DC: American Chemical Society, 22–41.
Dutta, Sujay, Abhijit Biswas, and Dhruv Grewal (2007), “Low Price Signal Default： An Empirical Investigation of Its Consequences,” Journal of the Academy of Marketing Science, 35 (1), 76–81.
European Food Safety Authority (2010), Labeling, Presentation and Advertising of Foodstuffs §2000/13/EC. Retrieved Jun 1, 2012, from http://europa.eu/legislation_summaries/consumers/product_labelling_and_packaging/l21090_en.htm
Food and Drug Administration, Department of Health, Executive Yuan, R.O.C. (2000), Act Governing Food Sanitation §17-I-5. Retrieved Jun 1, 2012, from http://www.fda.gov.tw/people_laws.aspx?peoplelawssn=410&keyword=&classifysn=62
Harcar, Talha and Fahri Karakaya (2005), “A Cross-Cultural Exploration of Attitudes toward Product Expiration Dates,” Psychology and Marketing, 22 (4), 353–371.
Heenan, Samuel P., Nazimah Hamid, Jean Pierre Dufour, Winna Harvey, Conor M. Delahunty (2009), “Consumer Freshness Perceptions of Breads, Biscuits and Cakes,” Food Quality and Preference, 20 (5), 380–390.
Ittersum, Koert Van, Math J.J.M. Candel, and Matthew T.G. Meulenberg (2003), “The Influence of The Image of A Product’s Region of Origin on Product Evaluation,” Journal of Business Research, 56 (3), 215–226.
Locure, Anetra L. Harbor, Patricia E. Mclean Meyinsse, and Vernisha V. Bethea (2001), “Label Use and Importance Rankings for Selected Milk Labeling Attributes,” Journal of Food Distribution Research, 32 (3), 54–68.
McCabe, Deborah Brown, and Stephen Nowlis (2003), “The Effect of Examining Actual Products or Product Descriptions on Consumer Preference,” Journal of Consumer Psychology, 13 (4), 431–439.
Miller, Carla, Rex Warland, and Cheryl Achterberg (1997), “Food Purchase Decision-Making Typologies of Women with Non-Insulin-Dependent Diabetes Mellitus,” Patient Education and Counseling, 30 (3), 271–281.
Nijs, Vincent R., Marnik G. Dekimpe, Jan-Benedict E.M. Steenkamps, and Dominique M. Hanssens (2001), “The Category-Demand Effects of Price Promotions,” Marketing Science, 20 (1), 1–22.
Peneau, S., A. Linke, F. Escher, and J. Nuessli (2009), “Freshness of Fruits and Vegetables: Consumer Language and Perception,” British Food Journal, 111 (3), 243–256.
Peneau, S., E. Hoehn, H.-R. Roth, F. Escher, and J. Nuessli (2006), “Importance and Consumer Perception of Freshness of Apples,” Food Quality and Preference, 17 (1), 9–19.
Roth, Martin S. and Jean B. Romeo (1992), “Matching Product Category and Country Image Perceptions: A Framework for Managing Country-Of-Origin Effects,” Journal of International Business Studies, 23(4), 477-497.
Sen, Sankar and Lauren G. Block (2009), “ ‘Why My Mother Never Threw Anything Out’: The Effect of Product Freshness on Consumption,” Journal of Consumer Research, 36 (June), 47-55.
Theotokis, Aristeidis, Katerina Pramatari, and Michael Tsiros (2012), “Effects of Expiration Date-Based Pricing on Brand Image Perceptions,” Journal of Retailing, 88 (1), 72–87.
Tsiros, Michael and Carrie M. Heilman (2005), “The Effect of Expiration Dates and Perceived Risk on Purchasing Behavior in Grocery Store Perishable Categories,” Journal of Marketing, 69 (April), 114–129.
Tversky, Amos and Daniel Kahneman (1974), “Judgment under Uncertainty： Heuristics and Biases,” Science, 185 (September), 1124–1131.
United States Department of Agriculture, Food Safety and Inspection Service (2011), “Food labeling,” Retrieved Jun 1, 2012, from http://www.fsis.usda.gov/fact_sheets/Food_Product_Dating/index.asp
U.S. Food and Drug Administration (2007), Code of Federal Regulations §21CFR101. Retrieved Jun 1 , 2012, from http://www.gpo.gov/fdsys/pkg/CFR-2007-title21-vol1/content-detail.html
Verlegh, Peeter W. J. and Jan Benedict E.M. Steenkamp (1999), “A Review and Meta- Analysis of Country-of-Origin Research,” Journal of Economic Psychology, 20 (June), 521–546.
Wandel, Margareta (1997), “Food Labelling from A Consumer Perspective,” British Food Journal, 99 (6), 212-220.
Wansink, Brian and Se-Bum Park (2002), “Sensory Suggestiveness and Labeling：Do Soy Labels Bias Taste?,” Journal of Sensory Studies, 17 (January), 483–491.
Wansink, Brian (2003), “How Do Front and Back Package Labels Influence Belief about Health Claims,” Journal of Consumer Affairs, 37 (2), 305–316.
Wansink, Brian and Alan O. Wright (2006), “‘Best if Used By…’ How Freshness Dating Influences Food Acceptance,” Journal of Food Science, 71 (4), 354–357.
Wansink, Brian, K. Van Ittersum, and J. E. Painter (2004), “How Diet and Health Labels Influence Taste and Satiation,” Journal of Food Science, 69 (9), 340–346.
Zuzanna, Pieniak and Verbeke Wim (2008), “Consumer Interest and Marketing Potential of Information on Fish Labels,” paper presented at 12th Congress of the European Association of Agricultural Economists, 1-3.