The Handbook Co.·Research & Evidence

The evidence
behind the books

We publish only what we can stand behind. Every number in every Handbook is traced to a named source before the book goes on sale — and traced again, on a schedule, after. This page is the ground we are standing on, in full view.

We are a decision-making publisher. People come to us at the moments that decide something — a career change, a first job, an interview, a forced restart — and the worst thing we could hand them is confident-sounding advice built on a number nobody checked. So we don't. Before a Handbook is offered for sale, every statistic, every dated claim, and every named study in it is verified against the original source. Where the source turns out not to say what the claim says, we change the claim — not the source. That discipline is the whole product. The writing is the part you see; the checking is the part that lets you trust the writing.

How we verify

One claim, one source, one check.

One claim, one source, one check
Each Handbook goes through a single editorial pass that pulls out every number, every date, and every named author, and checks each one against its primary publication — the government release, the peer-reviewed paper, the original report. Not a summary of it. Not an article describing it. The source itself.
When the source doesn't hold, the claim moves
If a figure cannot be traced to a primary source — or if the source says something narrower than the claim did — we rewrite the line to match what the evidence actually supports, or we remove the number and keep only the part that stands. We would rather publish a smaller, true claim than a bigger one we cannot defend. We have done exactly this: in a June 2026 review we found a widely-repeated pair of resume-format statistics that traced only to industry blogs citing an unnamed survey, with no original study behind them. We removed the precise figures from every Handbook that carried them and kept only the well-supported direction. The argument survived; the false precision did not.
Every Handbook is peer-reviewed before it is written
Each Handbook is built on a research paper that is reviewed by a panel before any chapter is drafted. The reviewers' job is to attack the reasoning — to find the claim that is too strong, the source that is too thin, the conclusion the evidence does not earn. Only what survives that review becomes a book.
Three grades of evidence, named honestly
Not all evidence is equal, and we don't pretend it is. We grade what we stand on, and we tell you which grade a claim sits on.
I
Strongest ground
Government statistics and peer-reviewed studies. We state these as precise figures.
II
Useful, named
Industry and recruiter surveys. Useful, but they vary by who ran them — so we name the survey and state the finding by direction, not by a single percentage.
III
Still settling
Where something is a trend rather than a settled fact — the role of AI in interviews is the clearest example — we say so, in the book, on the page where the claim appears.
The sources

What each Handbook stands on.

Each Handbook below links to its full citation ledger. The anchors named here are the load-bearing sources — the ones the book's core advice rests on.

The Career Pivot Handbook
The career-change Handbook stands on how applications are actually read. The recruiter's first-pass scan averages 7.4 seconds (Ladders eye-tracking study, 2018). Around 98% of the Fortune 500 screen applications through an applicant tracking system before a person sees them (Jobscan ATS Usage Report, 2025). The strongest single study on tailoring beats volume comes from Wellfound (2024), which found tailored applications converting at 11.7% against 4.2% for generic ones across roughly 15,000 applications — a result whose direction is robust even where other studies put the magnitude differently. On resume format, the settled consensus across ATS vendors and recruiting practitioners — rather than any single survey — is that a reverse-chronological structure parses more reliably, because each keyword sits tied to a dated role, and reads as more trustworthy to recruiters than a skills-first layout. Cover-letter evidence is drawn from named hiring-manager surveys (Resume Genius, Zety), which agree that most hiring managers read cover letters and that a majority weigh them in the interview decision.
Full ledger →
The Interview Handbook
The interview Handbook rests on the strongest evidence base of the four, because the academic literature here is deep. The finding that structured interviews predict job performance better than any other interview format comes from Schmidt & Hunter (1998, Psychological Bulletin), updated by Sackett et al. (2022, Journal of Applied Psychology), which place the validity of structured interviews around r = .42–.51 — among the highest of any selection method measured. That behavioural questions now dominate interviews, and that only about a third of candidates prepare structured answers, comes from LinkedIn Talent Solutions' Global Recruiting Trends reporting and SHRM. The AI-in-interviews material is named in the book as a moving target, sourced to 2025 industry and academic work, and flagged for revision within twelve months. The salary-negotiation chapter holds a deliberately contested-evidence position: Babcock & Laschever (2003) and the critique in Artz, Goodall & Oswald (2018, Industrial Relations) — the debate is named rather than resolved.
Full ledger →
The First-Role Handbook
The first-job Handbook is grounded in graduate-outcomes data. In Australia, the Graduate Outcomes Survey (QILT, 2024) reports 74.0% of domestic undergraduates in full-time work about four months after finishing, down from 79.0% the year before, with a visible layer of graduates working below their qualification level. In the US, the NACE 2025 Student Survey (n = 13,684) found graduating seniors averaging 30 applications before landing a role and receiving fewer offers per application than the prior class. The structural finding that "entry-level" increasingly carries real experience requirements is drawn from the Indeed Hiring Lab tightening-postings trend across multiple 2024–2025 posts, stated as the direction it supports rather than a single headline number. Resume-format and recruiter-scan guidance shares the same evidence base as the Career Pivot Handbook.
Full ledger →
The Rebound Handbook
The Handbook for a forced restart stands almost entirely on government data. The US Bureau of Labor Statistics Worker Displacement Summary (2021–2023 data, released 2024) is the anchor: 65.7% of long-tenured displaced workers were reemployed by January 2024; of those back in full-time work, 62% matched or exceeded their previous earnings while 38% took a cut; and the reemployment rate for workers aged 55–64 was 55.3%. Median US job tenure of 3.9 years comes from the BLS Employee Tenure Summary (2024). International readers are served by primary government data too — UK unemployment at 5.0% for early 2026 (Office for National Statistics) and Canadian unemployment peaking at 7.1% in August 2025 (Statistics Canada). The transition framework that shapes the middle of the book draws on William Bridges' Managing Transitions and Nancy Schlossberg's transition theory.
Full ledger →
Guides, Templates, and Tools
Our Guides and Templates are drawn from the same researched Handbook material — atomised and rebuilt for a single task, never invented separately. A claim that has been verified for a Handbook carries its verification with it into any Guide or Template built from it.
The edges

What we don't claim.

Honesty about evidence means being clear about its edges. Some of what we write describes trends still settling rather than facts already settled — the role of AI in hiring most of all. Where that is true, the book names the source on the page so you can weigh it yourself. Some figures are drawn from practitioner experience rather than a single published distribution; where we lean on a practitioner range, we say so and we name the direction the harder data points in. And we do not claim that any Handbook guarantees an outcome. The decisions are yours. Our job is to make sure the ground you make them on is real.

The schedule

When we check again.

Verification is not a one-time event. Every Handbook carries a scheduled re-audit date — six months from launch — on which we re-verify every claim, swap in newer or stronger studies where they have landed, and publish the updated edition. Faster-moving figures, such as platform user counts, are reviewed more often than that. When a claim changes, the change is named, not quietly swapped.

Found something that's moved?

Tell us, and the next edition reflects it.

If you spot a number that has drifted, a study that has been retracted, or a source that no longer holds up, tell us: hello@thehandbookco.com. We read every correction, we reply, and where the correction is material the next edition reflects it — with thanks, and with the change named on the record.

We publish only what we can audit. Every claim sourced. Every product crafted. Every price defended.
— Jon, Publisher