Parent Brand Equity and Extension Fit

Product & Brand ManagementPeng, C.; Bijmolt, T.H.A.; Völckner, F.; Zhao, H. · 2023Journal of Marketing

Topicsbrand extension·parent brand equity·extension fit·meta-analysis·signaling theory·categorization theory·line extension

Your brand team brings two extension proposals. One has strong parent brand equity but weak extension fit; the other has the reverse. Success here means how consumers rate the extension or whether they intend to buy it. Is one strength enough to approve a proposal, and should the bar differ for service, goods, prestige and nonprestige parent brands?

Parent brand equity and extension fit are both linked to extension success, fit slightly more strongly.

Data chart

Each driver's link is stronger when the other is strong

How closely each driver moves with consumers' attitude toward, or intention to buy, the extension, as a correlation from 0 (no link) to 1 (a perfect link), when the other driver is rated low versus high.

Each driver keeps a positive link when the other is weak.

Each driver's link to extension success grows when the other is strong, and each keeps a positive link when the other is weak.

Predicted correlations, Table 5, p. 919 and Table 6, p. 921: parent brand equity .245 at low fit and .428 at high fit; extension fit .273 at low equity and .398 at high equity. Low and high mean well below and above the average rating, within the rating scale; other factors stay at their averages. Extension success means consumer attitudes or purchase intentions; the links do not establish causation.

Data chart

Fit has a much weaker link for prestige brands

How closely extension fit moves with consumers' attitude toward, or intention to buy, the extension, as a correlation from 0 (no link) to 1 (a perfect link), for nonprestige versus prestige parent brands.

Fit counts for much less with prestige brands.

Extension fit has a much weaker link to extension success for prestige than for nonprestige parent brands, while retaining a small positive relationship.

Predicted correlations, Table 5, p. 919 and Table 6, p. 921: nonprestige .355 and prestige .105; the latter is a small positive relationship. Extension success means consumer attitudes or purchase intentions, rather than sales or financial outcomes.

Action guide

Review parent brand equity and extension fit together before approval.Each still counts when the other is weak, so do not screen a proposal out on either one alone.
By default, weight extension fit slightly above parent brand equity.Fit has the slightly stronger link with success overall, but equity still counts as its own input.
Give parent brand equity more weight if your brand sells services.Equity's link with success is stronger for service brands than goods brands, but how it ranks against fit by brand type is exploratory.
Give extension fit less weight when the parent is a prestige brand.Fit's link with success is much weaker for prestige brands than for nonprestige ones, though still positive.
Judge parent brand equity on more than familiarity.Ask your team to assess brand attitude, perceived quality and loyalty, and to pair brand attitude with extension fit when choosing extensions.
Match launch communications to the extension's main strength.Product details go with a stronger equity link and a weaker fit link, so feature them when the extension leans on equity.

Evidence

Across many pooled studies, parent brand equity and extension fit each have a medium positive link with extension success. In a direct comparison, fit's correlation with success is about 0.36 and equity's about 0.29.
Each driver keeps a positive link with success when the other is weak, and each link is stronger when the other is strong. Fit's correlation rises from about 0.27 when equity is low to about 0.40 when it is high, and equity's link rises the same way as fit improves.
Parent brand equity has a stronger link with success when the parent brand sells services rather than goods, about 0.41 against about 0.32. Exploratory comparisons put equity ahead of fit for service brands and fit slightly ahead for goods brands.
Extension fit has a much weaker link with success for prestige parent brands than for nonprestige ones, about 0.11 against about 0.36.
Of the parts of parent brand equity, familiarity has the weakest link with success, about 0.09 and not reliably different from zero. Brand attitude, quality and loyalty each sit between about 0.30 and 0.40.
When extension communications include product details such as price, function or image, equity's link with success is stronger, about 0.41 against about 0.30 without them. Fit's link is weaker, about 0.27 against about 0.39.

Key takeaway

Weigh parent brand equity and extension fit together: fit counts slightly more overall, and brand type shifts the balance.

Limitations

The evidence covers line and category extensions in 26 countries from 1990-2020 and measures consumer attitudes and purchase intentions, not sales, market share, financial returns or harm to the parent brand. These links do not show what causes extension success.

Source

Peng, C., Bijmolt, T.H.A., Völckner, F., & Zhao, H. (2023). A Meta-Analysis of Brand Extension Success: The Effects of Parent Brand Equity and Extension Fit. Journal of Marketing, 87(6), 906-927. https://doi.org/10.1177/00222429231164654.

https://doi.org/10.1177/00222429231164654

Exact values behind the rounded figures: extension fit .356 versus parent brand equity .294 in the combined analysis; equity .245 at low fit and .428 at high fit, and fit .273 at low equity and .398 at high equity; equity .409 for services versus .317 for goods; fit .355 for nonprestige versus .105 for prestige brands; familiarity .092, quality .295, loyalty .351, and attitude .404; equity .298 without extension product cues versus .411 with them, and fit .388 without these cues versus .269 with them.