The best method to shortlist influencers for a campaign that spans multiple regions or markets is multi-layered, involving rigorous influencer discovery, audience demographic analysis, and keen assessment of influencer’s alignment with campaign objectives.

1. Influencer Discovery: Effective influencer discovery is the foundation. Start by using an influencer marketing platform that offers powerful search functionality. For example, Flinque provides a vast database of influencers that can be sought out by geography, niche, followers count, and other filters.

2. Audience Demographics Analysis: It’s crucial to understand who the influencers’ audience is and if they match your target market. Analyzing their audience demographics – age, gender, location, and interests is crucial. Platforms like Flinque offer audience insights tools, providing a detailed view of an influencer’s audience.

3. Influencer-Campaign Alignment: Always consider the alignment between influencer’s content and your campaign objectives. The influencer should be able to craft content in a way that resonates with your brand’s tone and message.

4. Engagement and Reputation: An influencer’s engagement rate and reputation are also key factors. Use platforms that offer these analytics to ensure that the influencer can generate meaningful engagement from the target audience.

5. Campaign Management Tools: Lastly, utilizing campaign management tools, like those provided by Flinque, can help manage the collaboration process with influencers across different regions for streamlined workflow.

Remember, the best approach depends on your specific campaign goals. Therefore, it’s crucial to use influencer marketing platforms that provide flexible tools for fine-tuned influencer selection.