Abstract: A vendor portal for electronic commerce over a network is provided. The vendor portal comprises a vendor portal web site, a collection of preconfigured modules linked to the portal, and vendor tools to enable a vendor to compile a promotional offer or service by selecting and personalising one or more preconfigured modules. The vendor portal further comprises a unique identifier generator to generate and link a unique identifier to said promotional offer or service; wherein the portal is operable to cause the vendor compiled promotional offer or service to be displayed on a user interface of a customer's networked device when a customer uses their networked device to scan said unique identifier.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to evaluate model stability and fit. An example method disclosed herein includes building a fit function based on causal factors associated with a marketing mix model, building a stability function based on override factors associated with corresponding ones of the causal factors, and integrating scaling factors into the stability function to facilitate a combined regression analysis of the fit function and the stability function, the scaling factors respectively associated with corresponding causal factors.