Why You Find Jobs Through Acquaintances, Not Friends

In 1974, sociologist Mark Granovetter surveyed 282 professional workers in a Boston suburb. More than half found their current job through personal contacts — but among those, only 16.7% described the helpful contact as a close friend. The other 83% had barely seen the person.

When you need a new job, instinct says: go to the people you trust. A close friend, a relative in the right field, a proven mentor — who else is going to help? In 1974, sociologist Mark Granovetter tested this assumption against data — and that's exactly where it fell apart.

What Granovetter found — and why it surprised people

In Getting a Job: A Study of Contacts and Careers (Harvard University Press, 1974), Granovetter gathered data on 282 professional, technical, and managerial workers in Newton, Massachusetts. Most found their current job through people, not job postings. But who were those people? Among those who found jobs through personal contacts, 55.6% saw the helpful person only occasionally, and another 27.8% saw them rarely or almost never. Only 16.7% identified the contact as a close friend or someone from their inner circle.

A year earlier, in the American Journal of Sociology (1973), Granovetter had offered the theoretical explanation. Close friends form a dense network: they know the same people, attend the same events, receive the same professional news. Weak ties — an acquaintance from another field, a former classmate, someone from an old job — bridge different circles. They carry information you don't have: an unadvertised opening, the name of the person making the hiring decision, a candid picture of what a profession actually looks like from the inside.

Weak ties help not because those people are kinder. But because they are in a different information bubble.

Testing it on 20 million people

Granovetter's theory held as a classic, but it rested on 282 people from one American suburb in the 1970s. In 2022, Karthik Rajkumar and colleagues from LinkedIn, Harvard Business School, Stanford, and MIT published in Science an experiment of a different scale: 20 million users, a five-year period, two billion new connections, and 600,000 documented job transitions (doi: 10.1126/science.abl4476).

The result confirmed Granovetter — with one refinement. The relationship between tie weakness and career benefit is not linear: it's an inverted U-curve. Connections with people you have nothing in common with don't work — no information flows, no trust forms. What's effective is moderately weak: some shared background (school, a past job, adjacent interests), but each person moves in their own circles. This matters in practice: chasing connection counts with strangers on LinkedIn is wasted effort.

Why "networking" is usually misunderstood

The word conjures images of a business party: collecting business cards, introducing yourself to strangers, accumulating contacts for contact's sake. Research describes something different. The useful connections were formed earlier — through shared coursework, past projects, adjacent interests. Not "find the right person" but maintain living contact with people who move in other professional worlds.

Granovetter stressed: it's not about the warmth of the relationship or the accident of the meeting. It's about structural position — these people literally inhabit a different information space, and that's why they're valuable.

How this applies to career exploration

Weak ties are useful not only when searching for vacancies — they work even earlier, at the exploration stage. The real picture of a profession "from the inside" rarely comes from company websites. It comes from someone who works there or used to. One conversation with that person — what's typically called an informational interview — gives you in an hour what weeks of online searching won't: what a typical day looks like, what grinds people down, where careers actually grow.

If you don't yet know which direction to look for those contacts, start with the test. Once there's a direction, it's clear who to ask.

Sources

1. Granovetter, M. S. (1973). The Strength of Weak Ties. American Journal of Sociology, 78(6), 1360–1380.
2. Granovetter, M. (1974). Getting a Job: A Study of Contacts and Careers. Harvard University Press.
3. Rajkumar, K., Saint-Jacques, G., Bojinov, I., Brynjolfsson, E., & Aral, S. (2022). A causal test of the strength of weak ties. Science, 377(6612), 1304–1310. doi.org/10.1126/science.abl4476

This article is for educational purposes and does not constitute professional advice.