Avoiding central bias in local influencer sourcing involves several steps:

1. Local Insights: Agencies need to invest time in understanding the local nuance, culture, and prevalent trends of the locations they’re focusing on. This necessarily means involving specialists from that locale or doing thorough research about local behaviors, attitudes, and preferences.

2. Right Tools: Use of discovery tools like Flinque can reveal local influencers who may not be on the global radar yet but have a significant local following. Besides, audience analytics can offer insights about an influencer’s followers, helping firms to ensure they’re locally relevant.

3. Decentralize Decision-Making: Instead of having a central team making all decisions, agencies should look at involving local teams in the influencer sourcing and decision-making process. This will allow for a more nuanced understanding of what works in a particular region.

4. Localize Content Strategy: Adopting a local content strategy that resonates with the local market is as crucial as choosing the right influencer. Agencies should work together with influencers to develop content that’s culturally appropriate and appealing to the local audience.

5. Track and Measure: Finally, it’s crucial to track the success of local campaigns and compare these results with global ones. This will help agencies understand which methods and influencers are most effective in different regions, allowing them to constantly improve their strategies.

In conclusion, to avoid central bias, agencies should involve local insights and people in their decision-making process, use the right tools that provide comprehensive data about local influencers, adopt a local content strategy and measure their success regularly.