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We incorporate the media priming effects to explain how politicians can affect voters preferences on issues during the political campaign. We adapt well-known terms of international trade, such as absolute advantage and comparative advantage, to the context of parties' competition in political issues. We show that when either each party has an absolute advantage on a different issue or when parties have high comparative advantage on a different issue, the political campaign will consist of issue-emphasis divergence. However, when a party has an absolute advantage on both issues but the parties' comparative advantage is not high enough, the political campaign will consist of issue engagement or dialogue. Our results conciliate two separated theories concerning whether there must be dialogue or issue-emphasis divergence in the political campaign.

We incorporate the media priming effects to explain how politicians can affect voters preferences on issues during the political campaign. We adapt well-known terms of international trade, such as absolute advantage and comparative advantage, to the context of parties' competition in political issues. We show that when either each party has an absolute advantage on a different issue or when parties have high comparative advantage on a different issue, the political campaign will consist of issue-emphasis divergence. However, when a party has an absolute advantage on both issues but the parties' comparative advantage is not high enough, the political campaign will consist of issue engagement or dialogue. Our results conciliate two separated theories concerning whether there must be dialogue or issue-emphasis divergence in the political campaign.

In this article, a two-party contest where candidates allocate their campaign resources strategically between two salient issues is studied. The analysis aims to determine the circumstances under which there is issue convergence (both parties emphasizing the same issue) or issue divergence (different parties emphasizing different issues) during a political campaign. For this purpose, the concepts of a party's absolute and comparative advantage are used. A party has an absolute advantage on an issue if a majority of voters prefer its position on this issue to that of its opponent. A party has a comparative advantage on an issue if the percentage of votes that it would obtain if voters cared only about that issue is larger than those that it would obtain if voters cared only about the other issue. It is shown here that issue convergence can occur only if one of the parties has an absolute advantage on both issues, but its comparative advantage is not too large. Otherwise, there will be issue divergence in the political campaign. Adapted from the source document.

We explore the role that campaign expenditures play in determining electoral outcomes. We study a two-party contest where campaign funds can affect the preferences of voters regarding the saliency of two political issues. We show that an advantage in campaign resources, a pre-campaign partisan advantage, an advantage on every salient issue, or a combination of these indicators, do not always guarantee electoral victory. By contrast, electoral victory is guaranteed if the sum of the proportions of the electorate supporting a party on every salient issue is greater than a critical value. For that to happen it is necessary (but not sufficient) that the party has an advantage on every salient issue. Adapted from the source document.