Every once in a while one of the journal articles I am reading aligns with something in my news feed. This happened to me recently. As I was reading a journal article on new research in alternative retail merchandising strategies, my LinkedIn feed was inundated with articles on the bankruptcy of Art Van Furniture, one of the Midwest’s leading furniture and mattress retailers. A few of the articles highlighted Art Van’s switch to ‘Lifestyle’ merchandising as one of the reasons for their collapse.
The article I was reading was titled “The Impact of Compliment-Based Assortment Organization on Purchases” by Panagiotis Sarantopoulos et al. published in the June 2019 issue of the Journal of Marketing Research. In the article, the authors present the results of several experiments purporting to show the impact of switching from a substitute-based merchandising strategy to a compliment-based merchandising strategy. Before we go any further, I need to provide some definitions.
The Merchandising Systems Explained
A substitute-based merchandising system is one where the offerings are grouped by their closest substitutes. In the example of a furniture store, all the couches would be displayed together. Chairs, coffee tables and lamps would be in different sections. Within the furniture industry, a good example of substitute-based merchandising would be American Freight.
A complement-based merchandising strategy is one where the offerings are grouped by context of use. In our furniture store example, couches, chairs, coffee tables and lamps might all be displayed as a set. Within the furniture industry, this is called ‘lifestyle’ merchandising. The classic example is Rooms To Go.
Few furniture retailers merchandise solely as substitute or compliment-based. Most merchandise somewhere along the continuum. Some, like IKEA, utilize both merchandising formats in different areas of the store. When consumers first enter an IKEA store, they progress through a series of lifestyle displays. The further they get into the store, the merchandising becomes more substitute-based.
Beyond furniture stores, the authors also provided examples of substitute and compliment-based merchandising for grocery stores, clothing stores, and restaurants.
The Research
In their research, the authors attempted to prove that consumers will buy more products and/or spend more money in a complement-based merchandising format than they would in a substitute-based format. To test this hypothesis, the authors conducted four studies. The most important study involved resetting an actual grocery store and comparing sales trend data versus a control store. Additional studies tested the hypothesis in a simulation of an on-line furniture dealer or in a virtual grocery store.
Without going into a lot of detail, each of the tests proved the primary hypothesis. In the real-world grocery store test, the average number of weekly purchases and the average transaction amount among shoppers in the complement-based merchandising format increased relative to the control store. In each of the other tests, the number of items purchased increased. (The transaction amount was not always tested.)
If we were to extend the findings to the furniture store arena, then we might conclude that Art Van’s switch to a ‘Lifestyle’ merchandising format should have been successful. If Art Van’s bankruptcy filing was any indication, the switch was not successful. The authors of the research did point to a few reasons why a compliment-based format might not always perform better.
Moderating Factors
In their article, the authors discussed several potential moderating factors. Moderating factors are things that, if they were present, might change the results so that a compliment-based merchandising format would not perform better. The authors identified three: visualization, involvement and shopping goal, and recognized two others in their literature review: effort and product function. Let’s review those one-by-one.
Visualization: Sarantopoulos and his colleagues hypothesized that shoppers who could easily visualize how or where they were going to use the product would be less likely to influenced by a compliment-based merchandising format. This hypothesis was tested, and proved, with the simulated on-line furniture store. As in the grocery store test, respondents spent more when shopping in a compliment-based format. However, when the data was filtered, those respondents who said they could easily visualize their target room spent the same amount regardless of which type of merchandising format they shopped.
Involvement: Sarantopoulos and his colleagues hypothesized that the more involved a consumer is in the purchase, the less likely they would be to spend more in a compliment-based merchandising format. They tested, and proved, this hypothesis by interviewing shoppers at the test and control grocery stores used in the earlier test. Again, respondents in total spent more when shopping in a compliment-based format. However, those respondents who placed greater importance on the items for which they were shopping spent the same amount regardless of which merchandising format they shopped.
Shopping goal: Sarantopoulos and his colleagues hypothesized that consumers who had specific goals, such as a shopping list, when they initiated their shopping trip would buy fewer products in a compliment-based merchandising format. They tested and proved this hypothesis in the simulated grocery shopping exercise. Respondents bought more products in a compliment-based format than in a substitute-based format. Respondents with a shopping list did buy fewer products than those without a list but they still they still purchased more products in a compliment-based format.
Effort: Kristin Diehl et al, in a paper published in the Journal of Retailing, hypothesized that a consumer’s preference for a compliment-based merchandising format was dependent upon the level of effort they were willing to expend while shopping. The authors of this study tested this hypothesis in a pair of simulated online exercises. Without going into the details of the exercises, the authors proved that the level of perceived effort expended while shopping impacted store preference and that the level of perceived effort was driven by the merchandising format and not by the number of screens the respondent had to access to view the complete selection.
Product Function (hedonic vs. utilitarian): Diehl and her colleagues also hypothesized that a consumer’s preference for a compliment-based merchandising format was dependent upon the function of the product being purchased. Specifically, they hypothesized that consumers shopping for more hedonic products, ones whose use provides sensory or emotional pleasure, will be more likely to prefer compliment-based formats versus those shopping for more utilitarian products. They were able to prove this hypothesis in a test involving office products.
The Missing Factor
Unfortunately, there is one moderating factor that was not tested by either group of researchers. Art Van and most other furniture stores employ sales associates that assist the shopper in the selection and purchase. These associates can have a significant impact on the number of items purchased, the transaction amount and the consumer’s perception of the store. It would be perfectly reasonable to hypothesize that the presence of a sales associate could moderate any difference in merchandising format among the shoppers they interact with.
Perhaps more important that simply the presence of the sales associate is the training and experience of the associate in the format being used. Most of us would easily accept the hypothesis that a more experienced sales associate would have a greater impact than a less experienced sales associate regardless of the merchandising format. The relevant question is what the impact on that effect would be of taking a sales associate out of one format and putting them into another.
Given Art Van’s experience, it would be interesting to run a test and control study, similar to Sarantopoulos’ grocery store study, examining sales in an assisted furniture store environment over an extended period of time. The hypothesis would be that any initial difference in sales would change over time as the sales associates become more experienced with the new merchandising format. Understanding the magnitude of effect, that time it takes to moderate and that factors that influence magnitude and time is the key to implementing a well-executed transition.
Summary
Given the research done on the topic, it was reasonable for Art Van management to believe that a compliment-based merchandising format might perform better than a substitute-based format. However, there were several moderating factors that should have given them pause before instituting a switch from one format to another. Among the relevant moderating factors were the ease with which furniture shoppers can visualize where their purchases are going, the high level of involvement furniture shoppers typically have and the hedonic nature of the purchase, particularly among high-end shoppers.
But, perhaps the one thing that should have prompted Art Van management to slow down and conduct a serious, well designed test, is simply the dearth of any existing research on the impact of switching from one system to another in an environment where sales associates play a significant role in the sale. If any such research has been done, Sarantopoulos and colleagues did not reference it in their literature review.
Links
- For more information on Art Van: https://www.detroitnews.com/story/business/2018/10/01/art-van-revamps-showrooms-website/1448283002/ and https://www.furnituretoday.com/furniture-retailing/what-happened-at-art-van/
- Sarantopoulos, P., Theotokis, A., Pramatari, K., & Roggeveen, A. L. (2019). The Impact of a Complement-Based Assortment Organization on Purchases. Journal of Marketing Research, 56(3), 459–478. https://doi.org/10.1177/0022243718823698
- Diehl, Kristin and van Herpen, Erica and Lamberton, Cait Poynor, Organizing Products with Complements versus Substitutes: Effects on Store Preferences as a Function of Effort and Assortment Perceptions (February 10, 2015). Journal of Retailing, 91 (1), March, 1-18, 2015. Available at SSRN: https://ssrn.com/abstract=2562805