The effectiveness of marriage mail (joint mailings where multiple advertisers share the same envelope) compared to individual mailings can vary depending on the specific goals and target audience of a marketing campaign. Here are some factors to consider when evaluating the effectiveness of marriage mail vs. individual mail:

Cost savings: Marriage mail can be cost-effective as multiple advertisers share the cost of production and postage. This can be beneficial for businesses looking to reach a larger audience without breaking the bank.

Reach and impact: Marriage mail may reach a broader audience as it combines the mailing lists of multiple advertisers. However, individual mailings can provide more targeted messaging and personalized content, which may resonate more with recipients.

Response rates: The response rates for marriage mail and individual mailings can vary based on factors such as the quality of the mailing list, the design and content of the mail piece, and the relevance of the offer to the recipient. Testing and tracking results are essential to determine which approach yields better results for a specific campaign.

In conclusion, marriage mail and individual mail can both be effective marketing strategies depending on the campaign objectives, target audience, and budget constraints. It is essential to carefully consider these factors and conduct testing to determine which approach works best for your business.