"It's not what you know, it's who you know." That holds true for many job seekers, but some industries tend to hire more from employee referrals than others.
LinkedIn analysed its member data to see how many new hires were already connected to someone at the company prior to joining, for each industry. When you have a "first degree" connection at a company, you have a better chance at getting in and may be referred to the job by that insider. These are the industries where LinkedIn members hired most from their employee networks:
You'll notice that most of these are highly technical or specialised industries. Of course, this could be representative of the kinds of industries that use LinkedIn most for networking.
Those that had the least correlation between new hires and network connections were in industries such as retail, cosmetics, textiles and food production:
Still, if you work in one of the industries with a high per cent of hires from direct connections, it's more encouragement to brush off that LinkedIn profile and embrace your professional network.
Industries Where Your Network Matters More Than You Think [LinkedIn Official Blog]