A confluence of changing demographics, economic factors, and customer preferences has the potential to create long-term disruptions across the food-industry value chain, according to a new joint study entitled “Trouble in Aisle 5,” by global investment bank Jefferies and global advisory firm AlixPartners.  Those disputions could transform where and how consumers shop for groceries as well as what products they choose. The study included a survey of 2,000 consumers conducted in May.

The impending transformation lies in changing demographics, the study said. Over the next decade, the baton will be passed from one mega-generation to another as “millennials” (born between 1982 and 2001) come of age and “baby boomers” (born between 1946 and 1964) enter the next phase of their lives and spending patterns. As a result, established food brands and traditional grocery stores will be pressured at both ends by sets of consumers with very different value equations.

“We envision an environment that will require increased nimbleness and a relentless focus on the consumer for established food manufacturers and retailers, and the potential for rapid growth for new concepts and products,” said David Garfield, managing director at AlixPartners and head of the firm’s consumer products practice.

“Millennials clearly present significant challenges, and food-makers and traditional grocery retailers need to start making changes now to address the emerging needs of this demographic group, as in many ways we’re just in the second inning of this ball game” said Scott Mushkin, managing director and senior equity research analyst for food and drug retailing and packaged food at Jefferies.

Based on the most recent projections by the U.S. Census Bureau, millennials over the age of 25 (the age at which income and household formation typically start to really accelerate) will make up roughly 19 percent of the U.S. population by 2020, up from just over 5 percent in 2010. These 64 million millennials will see a significant spending-power increase in the coming years as the median income for those households is expected to jump to more than $45,000 from just over $28,000. In fact, the study finds, food-at-home spending by millennials is set to jump by $50 billion annually through 2020.

By contrast, the baby boomer generation, which has had an outsized influence on consumer trends for decades, will fall to below 20 percent of the population in the next eight years. Baby boomers are also set to move out of their peak-earnings years into retirement and will be more reliant on fixed incomes by 2016, and their focus will undoubtedly turn further toward lifestyle preservation. Overall, says the study, at-home food spending by Boomers could fall by as much as $15 billion per year through 2020.

The study found that millennials have strikingly different attitudes towards consumption than their baby boomer parents and grandparents, which will put great pressure on the traditional model of homogeneous brands provided by traditional grocery retailers.

“Convenience is king with millennials–they expect to get what they want, when and where they want it, and they know they have options for both products and retailers. The emphasis on convenience represents a dramatic shift from baby boomers’ priorities, and it also presents big challenges, as well as opportunities,  for companies in the food industry,” Garfield said.

Millennials are much less loyal to both food brands and traditional grocery stores and much more willing to explore different distribution models (online shopping, smartphone shopping, delivery services, etc.) and spread their shopping across different brands and channels (mass merchants, club stores, drug stores, convenience stores, online, etc.) to fulfill their consumable needs. Of the millennials surveyed, 47 percent stated brands were “extremely” or “somewhat” important in their purchasing decision for groceries, compared to 61 percent of baby boomers (a 23 percent decrease). Similarly, only 41 percent of millennials’ total food spending is at traditional grocers, compared to 50 percent of baby boomers’ total food spending (an 18 percent decrease).

Millennials are also more price-sensitive than baby boomers, and the study found that their income has a dramatic effect on buying behavior. Among millennials earning less than $20,000 per year, price is far and away the most important attribute impacting purchase decisions, with 75 percent at this income-level citing price as “extremely important.”

As income rises, attributes such as product quality, healthy, and natural/organic increase in importance. Broadly, the study also found that millennials require a smaller discount to purchase private-label products.

While millennials are more price sensitive than baby boomers, they are, however, willing to pay more for the specific attributes they value: convenience, freshness, health, variety (of flavors, international/ethnic cuisines, product sizes, etc.,) and natural/organic. When it comes to natural/organic products, for example, 58 percent of millennials surveyed said they are willing to pay more for natural/organic products, compared to only 43 percent of baby boomers who said the same.

Despite the rising prominence of millennials, baby boomers will maintain significant influence on “Aisle 5” –traditional center-of-the-supermarket purchases– and food-makers and grocers will have to adjust to meet the needs of baby boomers as they age and as their finances, preferences, and choices change.

In addition, baby boomers, generally, are more loyal to both brands and retailers, and they remain committed to shopping the old-fashioned way: going to the local grocer armed with coupons to save money. With incomes falling, however, this generation appears less willing to pay additional money for what they desire, and these changing finances are making even the wealthiest baby boomers act “cheap.” On the other hand, taste, freshness, and quality will continue to be important, as will products addressing health and wellness, and specific dietary needs tied to aging.”

Jefferies and AlixPartners see “fresh and healthy” as a priority area for both millennials and baby boomers and represents a key area of opportunity for both traditional grocers and branded food-makers. For instance, despite the younger generation’s greater acceptance of mass merchants, drug stores, and online vendors for everyday essentials, more than 80 percent of those surveyed continue to shop traditional grocery stores for fresh products.

Overall, the study sees a more demanding environment across the entire food-industry value chain. For food companies, there will be greater pressure to deliver more for less– fresher, higher-quality product, with more choices and more convenience in a shopping environment where consumers are becoming less brand-loyal and more inclined to shop across channels.