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Commerce · II.08 · MMXXVI · daylight

La Bourse  /  Volume II  /  Nº II.08  /  Workbook — the student

A woman and a man seated across from each other in a bright open office, mid-conversation, plants beside them.
Plate II.08 · Workbook — the studentThe Handshake, and the Ledger Behind It.The handshake is not the opposite of the contract. It is a contract whose enforcement was paid for in advance, over years, by people who are not in the room.

WORKBOOK — THE STUDENT

Chapter II.08 · Networks, Trust, and Topology

For the person studying this alone, or in a seminar, with no organisation to change yet. You have a network already. It is smaller than you think, more valuable than you think, and it has never been measured.

WHY THIS WORKBOOK IS DIFFERENT

The chapter was written for someone with a purchase budget. You may not have one. What you do have is the only network you will ever be able to study from the inside, at the age when its structure is still being set.

That is not a consolation prize. Everything in the chapter is scale-free. The dyad count, the time budget, the two cost curves, the price of closure — all of them are as true of one person with forty ties as they are of a firm with forty suppliers, and the arithmetic is easier to do on yourself because you have access to the data.

You will build four things in ninety days: a measured map of your own network, a weak-tie budget you actually spend, one portable reputation asset, and one bridge you did not have. None of them requires anyone's permission.

PART ONE — DISCOVERY

Days 1–30: map what is already there

Exercise 1.1 — The tie inventory (120 minutes)

List every person with whom you have had a genuine two-way exchange in the last twelve months. Not followers, not contacts, not the group chat — exchange. Most students land somewhere between thirty and sixty.

For each one write four things: how you met them, how often you are in contact, whether you have ever asked them for anything, and whether they have ever asked you.

Then count. If you have 40 active ties and each takes two hours of genuine contact a year, you are spending 40 × 2 = 80 hours a year, which is 6.8 percent of the 1,168-hour annual social budget the chapter derives from Dunbar's time-budget work. Most students discover the opposite of what they expect: the network is not too large to maintain. It is far smaller than their capacity, and it is concentrated in one cluster.

Exercise 1.2 — The cluster test (60 minutes)

Take your list and draw the lines between the people on it — who knows whom, independently of you.

Now count the clusters. A cluster is a group where most people know most of the others. If your forty ties were all mutually connected, the network would hold 40 × 39 / 2 = 780 relationships. It almost certainly does not; what you will find is two or three dense clusters and a small number of people who belong to none of them.

Those unclustered people are the most economically valuable ties you have. Inside a cluster of fifteen, one more tie reaches zero people you could not already reach. One bridge to a different cluster of fifteen reaches fourteen. Mark your bridges. There are probably fewer than five.

Exercise 1.3 — The appreciative interview (45 minutes, with one other person)

Find someone fifteen to twenty years further along and ask exactly this, without variation:

Think of the best opportunity that ever came to you through another person. How well did you know them at the time, and what had happened between you before it?

Write the answer down verbatim. Ask three people if you can. You are looking for the Granovetter pattern in a form you cannot dismiss as a statistic: of jobs found through contacts in his Newton study, 83.4 percent came from someone seen less than twice a week.

Exercise 1.4 — Where you are the outsider (30 minutes)

Name one network you are currently outside and would like to be inside. Write down, honestly, what the entry requirement appears to be, and whether it is performance, acquaintance, or money. Keep this page. You will need it in Part Three, and you will need it again in ten years when you are the one holding the door.

PART TWO — THE ARITHMETIC

Days 31–45: learn to compute before you argue

Exercise 2.1 — Your two curves

Price the two topologies for yourself.

Your trust curve: 150 × (n − 1) per year at the chapter's assumptions, where the 150 is two hours of contact at a fully loaded 75 an hour. Substitute your own honest hourly value; the shape does not change.

Your contract curve: what it costs you to transact with a stranger — the platform fee, the deposit, the time spent on assurance. A student selling work online, buying a bicycle, or subletting a room is on this curve constantly.

Find your own crossover: n = 1 + 1.667 T on the chapter's figures. At 12 transactions a year the trust curve is cheaper below 21 people. At 90 it is cheaper below 151. Write down which side of your own crossing you are on, and for what.

Exercise 2.2 — The compounding exercise

Take the Knack and Keefer slope of 0.8 percentage points of growth per ten points of trust and compute what a twenty-point national move does over twenty-five years:

  20 × 0.080 = 1.60 pp/yr        1.0160^25 = 1.4871   ->  + 48.7 %

Then do it on the Zak and Knack slope of 0.67 per ten points:

  20 × 0.067 = 1.33 pp/yr        1.0133^25 = 1.3925   ->  + 39.3 %

Now write one paragraph explaining to a sceptic why you are quoting both, and why Beugelsdijk, de Groot and van Schaik's robustness failure in the extended sample belongs in the same paragraph rather than in a footnote. This is the single most transferable skill in the chapter. A range quoted with its weakness survives cross-examination; a point estimate does not.

Exercise 2.3 — The price of closure, computed on a real case

Find a market you know — student housing, a freelance platform, a local trade — and estimate k, the number of genuinely available counterparties, and k', the number most people actually consider. Apply the chapter's model:

  E[best of k] = 0.9 + 0.2/(k + 1)
  open to 40   ->  0.904878      closed to 8  ->  0.922222
  the gap      ->  1.7344 % of spend

On a purchase budget of 20,000,000 that gap is 346,883 a year. Scale it to your market. Then compute the other side: an entrant with no reputation earns, on the eBay experiment's finding, 8.1 percent less for identical goods — 40,500 a year on 500,000 of revenue. The ratio is 4.67 to one. Write both numbers down. Most arguments about exclusion are conducted without either.

Exercise 2.4 — The dyad table, drawn by hand

Reproduce this from the formula n(n−1)/2, and compute the last two columns yourself.

  n      dyads        ties/member   hours/yr   share of 1,168 h
  15           105             14       28.0            2.4 %
  150       11,175            149      298.0           25.5 %
  500      124,750            499      998.0           85.4 %
  1500   1,124,250          1,499    2,998.0          256.7 %

When you reach 256.7 percent you will have derived, from a time budget, why the outer Dunbar layer is acquaintance rather than relationship. That is a better piece of understanding than the number 150 has ever given anybody.

PART THREE — DREAM AND DESIGN

Days 46–70: build the apparatus

Exercise 3.1 — The weak-tie budget

Decide a number of hours a month you will spend on ties outside your densest cluster, write it in your calendar as recurring, and defend it when the month gets busy. Two hours a month is 24 hours a year — 2.1 percent of the 1,168 — and it is the highest-return line in this workbook.

Spend it on three things only: answering people who write to you, reconnecting with one dormant tie a month, and going to one room where you know nobody.

Exercise 3.2 — Build one portable reputation asset

A reputation that cannot leave the network that granted it is worth less than one that can. Build something that travels: a public record of work, a body of answered questions, a repository, a portfolio with dates on it, a reference you have asked for in writing while the work is fresh.

The test is precise. Could a stranger, with no access to anyone who knows you, form an accurate estimate of your reliability in ten minutes? If not, you are paying the newcomer's 8.1 percent on every new relationship, for years, unnecessarily.

Exercise 3.3 — Build one bridge

Pick one cluster you are outside and build a single genuine tie into it. Not a connection request — a tie: an exchange in which you gave something first.

Then compute what you just did. One bridge into a cluster of fifteen makes fourteen people reachable who were not. That is a better return than any additional tie inside your own cluster, which returns zero.

Exercise 3.4 — The ladder you will publish later

Write, in one page, the entry requirement for any network you will ever run: a seminar, a company, a studio, a fund. What does someone with no connection to you have to do to get in? Write it as performance, not acquaintance.

Keep the page. Date it. The purpose of writing it now is that you are currently outside more networks than you are inside, and that is the only moment at which this page is written honestly.

PART FOUR — DESTINY AND DELIGHT

Days 71–90: make it hold, and enjoy it

Exercise 4.1 — The decay schedule

Roberts and Dunbar's longitudinal work found that emotional closeness declines measurably when contact is not maintained. Ties do not end; they fade on a schedule.

So build the only maintenance system that survives a busy term: a list of your bridges — not everyone, the bridges — with the date you last spoke. Review it monthly. A four-line message to a dormant tie costs three minutes and resets the clock.

Exercise 4.2 — Notice the return

When a weak tie pays off — and within a year one will — write down what it was, who it was, and how long ago you last spoke to them before they answered. Keep these notes for a decade. You are assembling a personal replication of Granovetter's study, and it will be more persuasive to you than his was.

Exercise 4.3 — The delight audit

At the end of the ninety days, notice how much easier certain things have become and write down why. The point of this workbook is not virtue. It is that a well-maintained network feels like competence, and the feeling is accurate.

THE TERM PROJECT

One piece of work, carried the whole way

Map and price one real network.

Choose one: a student society, a local trade, an online marketplace, a music scene, a research field, a family business. Then produce a single document of six to eight pages containing:

  1. The map. Who the members are, how many, and which clusters exist. Give n and the implied dyad count n(n−1)/2.
  2. The two curves. Estimate T — transactions per member per year — and compute the crossover n = 1 + 1.667 T. State which side the network is on.
  3. The entry requirement. Observed, not stated. Ask three members how they got in and compare the answers with the official version.
  4. The price of closure. Estimate k and k' and compute the gap. Then estimate the outsider's cost using the 8.1 percent reputation premium as an anchor, and give the ratio.
  5. One honest negative about your own analysis. Name the assumption that, if wrong, would overturn your conclusion. Every figure in this chapter's model carries one; yours must too.
  6. A ladder. One page, written as though you were about to publish it to the network you studied.

The standard. Somebody inside that network should be able to read your document and recognise it, including the uncomfortable parts, and somebody outside it should be able to use your ladder.

SELF-ASSESSMENT

Score each honestly, one to five.

Under thirty means the arithmetic is not yet yours. Do Part Two again; it is the part that transfers.

CARRYING IT FORWARD

Three habits, and they cost almost nothing.

Answer people. The single highest-return behaviour available to someone early in their career is replying properly to strangers, because almost nobody does and the ones who remember it become your bridges.

Keep the record. Portable reputation compounds and it cannot be started retroactively.

Count before you argue. When somebody tells you a network is open, ask how many people joined last year. When somebody tells you it is closed, ask what the closure costs the people inside. Both questions are answerable, and you can now answer both.

APPRECIATIVE QUESTIONS FOR YOUR SEMINAR

  1. When has someone taken a chance on you before you had any record? What made that possible, and what would it take for more of it to happen here?
  2. Which of us has the widest bridge to a world the rest of us cannot reach, and what have we never asked them?
  3. What does this seminar do that makes it cheap to be honest in, and how would we know if that were eroding?
  4. If we published the entry requirement to this group, what would it say, and what would we want it to say?
  5. Where has a group any of us belongs to got something right about letting people in, and what exactly did they do?
  6. What is the smallest thing we could each do this month that would make our reputations portable?