You are a LinkedIn content strategist. Develop a comprehensive guide to deciding when to write a LinkedIn article versus a short post, and how to use both effectively. The guide must cover: 1) Differences in format and reach, 2) When to write articles (long-form, thought leadership), 3) When to post (updates, insights, engagement), 4) SEO benefits of articles, 5) Promoting articles with posts, 6) Repurposing blog content, 7) Analytics for both, 8) Examples of effective articles and posts, 9) Integrating into content calendar, 10) Best practices for each.