Some economics of zero hours contracts – part 1: concepts, definitions and initial puzzles

Unions say New Zealand employers are following trends overseas and adopting zero hour contracts: workers have to be available for work, but have no hours guaranteed. Unite Union national director Mike Treen said:

McDonald’s, KFC, Pizza Hut, Starbucks, Burger King, Wendy’s – all of the contracts have no minimum hours, and so people can be – and are – rostered anywhere from three to 40 hours a week, or sometimes 60 hours a week, and it depends a lot on how you get on with your manager.

No official figures are available on the number of people on zero hour contracts in New Zealand, but they are are available in the UK in the chart below. About 250,000 workers in the UK work on zero hours contracts.

These workers agree not to work for anyone else, but are not promised regular work at all with their new employer.

The question that must always be asked is why do people who are deemed competent to vote and drive cars sign zero hours contract? What is in it for them? David Friedman asked this question about the economics of restraint of trade agreements for employees:

…the employer who insists on an employee signing a non- competition agreement will find that he must pay, in additional wages or other terms of employment, the cost that the agreement imposes upon the employee, as measured by the employee and revealed in his actions.

It follows that the employer will insist on such an agreement only if he believes that its value to him is greater than its cost to the employee…

The contract is designed, after all, with the objective of getting the other party to sign it.

If I am designing the contract and offering it to many other parties, that may put me in a position to commit myself to insisting on terms that give me a large fraction of the benefit that the contract produces.

But it is still in my interest to maximize the size of that net benefit-which I do by only insisting on terms that are worth at least as much to me as they cost the other party.

The inherent inequality of bargaining power between employers and workers and the reserve army of the unemployed must not be all that they are cracked up to be these days if low paid workers have to sign legally enforceable restraint of trade agreements.

Obviously, the few members of the reserve army of the unemployed lucky enough to have a low pay, insecure job that offers no regular hours today have so many other job options that their employers must get them to agree not to quit and job-hop at will. Jobs must be readily available  to low paid workers for otherwise why do employers insist on this restraint of trade in employment agreements.

Why do workers sign these contracts, which can include a promise of exclusive services – not working for other employers? Several subsequent blog posts will attempt to answer this question

The inherent inequality of bargaining power between employers and workers doesn’t work too well here because  the worker is accepting this job as compared to these other options , which may include employment in an existing job.

Once a worker is on-the-job and has accumulated job specific human capital, issues of post-contractual opportunism come up on both sides.

An important function of the employment contract is to prevent attempts to renegotiate terms and conditions once one side of the other has committed to the relationship and will find it costly to go elsewhere.

Zero hours contracts are negotiated upfront, which makes them unappealing to anyone already has a job, unless the terms and conditions of a zero hour contract, including the wages paid are much more appealing than officious observers make out.

Richard Epstein made this point about the general operation of the labour market, which is of relevance to our search to the answers to the questions posed by this blog post:

Labour markets are not characterized by tricky externalities. They do not pollute streams or require the creation of public goods. They are not characterized by genuine breakdowns in information, as workers are in a position to observe the conditions of their employment on a day-to-day basis.

Left to their own devices, without explicit support from union activities, they will be highly competitive, and thus work hard to allocate scarce human capital to its most productive use.

Workers have the option to quit for higher wages, and employers can always seek out low cost techniques to reduce their labour costs.

Any short-term dislocation for firms or individuals is more than offset by the overall increase in the system productivity, spurred in part by clear signals that should increase investments in human capital.

Zero hours contracts are a new labour market phenomena . That is no reason to automatically default to monopoly explanations for their emergence, including their emergence in a highly competitive industries and highly competitive labour markets where  employees change jobs regularly.

As Coase said in the context of industrial organisation as a whole and novel business practices in particular:

One important result of this preoccupation with the monopoly problem is that if an economist finds something—a business practice of one sort or other—that he does not understand, he looks for a monopoly explanation. And as in this field we are very ignorant, the number of ununderstandable practices tends to be rather large, and the reliance on a monopoly explanation, frequent.

The next blog post arises out of my first exposure to the labour economics of working arrangements. Specifically, how the fixed costs of employment and the fixed cost of going to work  both lead to minimum hours constraints in most employment contracts.

Most of what I know about the  labour, personnel and organisational economics of working arrangements  was about explaining  why employers would expect an employee to work as a minimum number of hours if they were to employ them at all. Always good to start with explanations as to why zero hours should not exist, but they clearly do.

Subsequent blog posts will discuss zero hours contracts in the context of the team production and organisational architecture; and zero hours contracts, equalising differentials and job sorting.

2 Comments (+add yours?)

  1. nottrampis
    Nov 21, 2014 @ 09:41:25

    really interesting. Definitely in my Around the Traps

    Liked by 1 person


  2. Jim Rose
    Feb 12, 2015 @ 15:22:23

    Reblogged this on Utopia – you are standing in it! and commented:

    Zero hours contracts are back in the news I thought a better read blog this first of four posts on the topic



Leave a Reply

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Mind Hacks

Neuroscience and psychology news and views.

Gender Abolitionist

Examining Gender Identity ideology and its impact on Women's Sex based protections. Exploring how this has taken such firm root in Western societies (Cognitive & Regulatory Capture).

Bruner the Anarchist

The State is merely a legalized mafia claiming a monopoly on violence

Helen Joyce

Celebrating humanity's flourishing through the spread of capitalism and the rule of law


Research and reflection from both sides of the Atlantic

freer lives

A socialist critique of gender ideology

200-Proof Liberals

Celebrating humanity's flourishing through the spread of capitalism and the rule of law

Darwinian Business

A blog exploring business from an evolutionary perspective, by Max Beilby

Spin, strangeness, and charm

Politics, media bias, science, and psychology

Family Inequality

by Philip N. Cohen

What Paul Gregory is Writing About

Celebrating humanity's flourishing through the spread of capitalism and the rule of law


The Visible Hand in Economics

Kids Prefer Cheese

Celebrating humanity's flourishing through the spread of capitalism and the rule of law

George Mason Economics Society

Provoking discussion by publishing economic writing

Offsetting Behaviour

Celebrating humanity's flourishing through the spread of capitalism and the rule of law


Res ipsa loquitur - The thing itself speaks

single sex spaces

Single sex spaces are a question of consent

Adventures of a Tudor Nerd

Tudor History from the Wars of the Roses to the Death of Elizabeth I

Weapons and Warfare

History and Hardware of Warfare

No Punches Pulled

Laughter – the best medicine


Politics and Policy with a Libertarian Twist

Notes On Liberty

Spontaneous thoughts on a humble creed

Map Dragons

Written by map lovers for map lovers

New Historical Express

(Formerly Hatful of History)


Celebrating humanity's flourishing through the spread of capitalism and the rule of law

Barrie Saunders

Thoughts on public policy and the media

The Victorian Commons

Researching the House of Commons, 1832-1868

Coyote Blog

Celebrating humanity's flourishing through the spread of capitalism and the rule of law

American Enterprise Institute – AEI

Celebrating humanity's flourishing through the spread of capitalism and the rule of law

The History of Parliament

Blogging on parliament, politics and people, from the History of Parliament

Catallaxy Files

Australia's leading libertarian and centre-right blog

Books & Boots

reflections on books and art

Legal History Miscellany

Posts on the History of Law, Crime, and Justice

Sex, Drugs and Economics

Celebrating humanity's flourishing through the spread of capitalism and the rule of law

The Long Run

the EHS blog

%d bloggers like this: