The process of doing so is not as straightforward as it sounds, because something might simultaneously explain both air-traffic and growth, and so it is necessary to go through a complicated econometric procedure to purge any correlation of air traffic and growth of variables that might explain both.

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Business growth in such a field is typically good at first as those who most value the procedure pay for it.

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Erdogan is seeking to restrict not only abortion but also births by caesarean section, a procedure whose growing popularity he has attributed to secret foreign plots to stall Turkey's economic growth.

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