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Within the European regions formed on the borders between Ukraine and the EU, the activation of investment cooperation and the diversification of its areas of activity are largely determined by the nature of the investment climate. This is because the investment climate’s features determine the importance of investment projects and their implementation in the relevant cross-border regions, will prioritize the development of these areas, as well as providing the availability of positive stimulus for legitimate investors for their work in the cross-border market.

Recommender systems play a vital role in the marketing of various goods and services. Despite the intensive growth of the theory of recommendation algorithms and a large number of their implementations, many issues remain unresolved; in particular, scalability, quality of recommendations in conditions of sparse data, and cold start. A modified collaborative filtering algorithm based on data clustering with the dynamic determination of the number of clusters and initial centroids has been developed.