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This paper studies the empirical relation between market competition and innovation using Luxembourg's Structural Business Statistics. The competitive pressure in Luxembourg's markets is assessed by computing a profit elasticity measure, based on the idea of cost-efficiency. From this, the paper analyses the relation between competition and innovation performance by estimating an equation for the determinants of R&D expenditure. The results show that Luxembourg's industries are characterised by low levels of competition intensity, especially in markets relevant to competition policy and regulation. The relation between competition and innovation is non-linear and depends crucially on the efficient use of inputs to production. The impact of the distribution of technological efficiency on innovation is assessed by measuring both average technology gap and technology spread. The innovation effort is increasing as industries are closer to the frontier, and decreasing in the technology spread.

Bloggers devote significant time not only producing content for others to read, watch or listen to, but also paying attention to and engaging in interactions with other bloggers. We hope to throw light not only on the factors that gain bloggers significant readership and lively interactions with their audience, but also on the rules that govern their relations with others. We relate bloggers' activity with the size and structure of their network of fellow bloggers. A blogger's readership increases with his activity, while bloggers who read back proportionally fewer of their readers tend also to be more active. We find evidence that those bloggers who read back proportionally fewer of their readers have less readers than bloggers who reciprocate more, but tend to receive more comments per posts.

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