In a typical NERA loop, the interviewer is not waiting for a "go / no-go" recommendation. They are waiting to hear whether you would put a sentence in a memo that an expert has to defend under oath. That is the filter most candidates miss.
The thesis is simple: NERA Economic Consulting hires people who can keep two explanations alive until the data kills one of them. If your instinct is to close the case with a crisp CEO answer, you will sound prepared and still fail the room. After this piece you should be able to reframe a NERA-style prompt as a regulatory question, run a clean residual-math check, and know what the firm itself says about how it hires.
What the firm actually is
NERA's about page dates the firm to 1961 and, as of 2026, notes a 65-year anniversary. The same page describes the work as rigorous analysis, expert testimony, and data-powered policy recommendations for law firms, corporations, regulators, and governments. That is not the Oliver Wyman strategy deck business, even though both sit under Marsh.
The firm is explicit about ownership. On careers materials it says NERA is part of Marsh and that applications route through the Marsh jobs board. On the about page it calls itself a subsidiary of Marsh with Fortune 250 parent technology support. Treat "Marsh McLennan" as corporate parentage, not as a signal that your Mercer or Oliver Wyman interview stories transfer.
Practice work is public on the site. Power, utilities, and renewables covers rate regulation, cost of capital, wholesale market design, market-power mitigation, and expert evidence in regulatory proceedings. Antitrust and competition covers mergers, collusion, dominance, and agency submissions. Transfer pricing is a large in-house economics practice around intercompany pricing and controversy. The interview flavor follows the practice that invited you. Do not prepare one generic "econ consulting" script.
What NERA publishes about the interview
Candidates invent process folklore. Prefer the firm's own FAQ.
On Open Roles, NERA states that applicants submit a CV, cover letter, and transcripts, and that some roles also require a writing sample. Junior hiring has a seasonal peak in the fall, but openings appear year-round. Summer internships exist for final-year undergraduates and for current master's and PhD students; many interns convert to full-time roles.
On the interview itself, the firm says the process is aimed at getting to know you, testing analytic capability, and introducing colleagues and work. Expect questions about background and experience. You may be asked to complete a case study. Experienced applicants may present job-market papers or economic publications. Hybrid schedules vary by group and are set by group directors.
That is the durable primary record. Round counts, average days-to-offer, and Glassdoor difficulty scores are candidate-channel folklore. I will not treat them as facts here. Confirm format, office, and practice with recruiting for your invite.
| Signal from NERA | What it implies for prep |
|---|---|
| Writing sample for some roles | Clear prose under time pressure matters as much as oral MECE |
| Case study possible | Expect a data or policy prompt, not a grocery profitability close |
| Papers for experienced hires | PhD and advanced tracks look like research conversations |
| Practice-area hybrid norms | Ask which group, not "does NERA WFH" |
The scoring instinct that beats frameworks
I stop listening when a candidate builds a 3C, invents a "value capture" lever, and never names the decision-maker. At NERA the decision-maker is often a regulator, a court, or an opposing expert, not a CEO optimizing EBITDA.
What the sheet rewards, in my experience across econ-consulting rooms:
- Name the question the expert must answer. "Was the firm pivotal?" "Is the proposed ROE supported by the proxy group?" "Does the functional analysis support a cost-plus mark-up?" Not "how do we grow."
- State the identifying assumption. Residual demand needs a constraint topology. An ROE comparison needs a comparable-risk peer set. Transfer pricing needs a functional characterization.
- Offer the competing story. Scarcity vs market power. Prudent investment vs gold-plating. Arm's-length vs controlled pricing that fails a CUP screen.
- Ask for the next document, not the next brainstorm. Offer curves, outage tickets, proxy-group betas, intercompany agreements.
Ned's rule. If your answer would still work if you swapped "regulator" for "CEO," it is the wrong answer for NERA. Rewrite until the audience is someone who can cross-examine you.
Worked example: Clearwater Utilities and a proposed ROE
Prompt. Clearwater Utilities, a vertically integrated water company, files for a rate increase. Rate base is $2.40 billion. Capital structure in the filing is 45% equity / 55% debt. Proposed allowed ROE is 10.8%. The last five decided peer water cases in the region awarded ROEs between 9.3% and 9.9%, median 9.6%. Staff counsel asks your team whether the proposed equity return is supportable and what else you need before drafting testimony. You are the junior on the expert team. Numbers are illustrative.
Reframe. This is not "should Clearwater maximize firm value." The regulatory question is whether the allowed return on equity is within a defensible range given comparable risk, and what delta in annual revenue requirement that implies.
Table the gap.
| Item | Filing | Peer median | Delta |
|---|---|---|---|
| Allowed ROE | 10.8% | 9.6% | +1.2 pp |
| Equity portion of rate base | 0.45 × $2.40bn = $1.08bn | same base | — |
| Annual equity return | 10.8% × $1.08bn = $116.6m | 9.6% × $1.08bn = $103.7m | +$12.9m / year |
Reproduce the math: equity rate base = 0.45 × 2.40 = 1.08. At 10.8% you get 0.108 × 1.08 = 0.11664 billion, or about $116.6m. At 9.6% you get 0.096 × 1.08 = 0.10368 billion, or about $103.7m. Gap ≈ $12.9m of annual equity return before tax gross-up and before any other rate-design changes.
What a good oral answer sounds like. "On the face of the peer awards, the filing sits 1.2 points above the regional median, which is about $13m a year of extra equity return on this rate base. That is a screen, not a finding. Next I would ask for the proxy-group construction, beta and size adjustments, flotation costs if claimed, and whether Clearwater's risk profile differs from the peers on drought exposure, capital plan, or ring-fencing. I would also check used-and-useful disputes on plant in rate base before arguing about the cost of capital."
What a McKinsey-trained candidate does wrong. They recommend "align ROE to create shareholder value," ignore that allowed ROE is set by a commission, and never mention used-and-useful plant or proxy groups. They treat $12.9m as a pricing opportunity rather than a contested parameter in a rate order.
If your invite is wholesale power or antitrust instead of a rate case, keep the same instinct: name the regulatory or litigation question, compute a transparent screen, refuse to call it a verdict, and list the documents that would reverse you.
How MBB case muscle fails this room
Strategy cases reward a recommendation under uncertainty. Expert work rewards a paragraph that survives markup. The habits that win Bain first rounds often lose here:
- Closing too early with "I recommend we…"
- Treating prices as branding or willingness-to-pay problems when the issue is residual demand or allowed return
- Ignoring physics and tariff rules (transmission constraints, used-and-useful, mitigation already in the tariff)
- Practicing only oral profitability cases and never explaining a chart's axes, shock, and alternative explanations
- Mixing Marsh-family branding: Mercer is HR/benefits; Oliver Wyman is management consulting; NERA is economic expert work
Peer econ firms differ too. Compass Lexecon skews harder toward merger IO. Cornerstone skews toward securities empirics and event studies. Analysis Group is broader applied micro. NERA is where rate cases, energy market design, and regulator-facing memos show up often. Confirm your practice; do not collapse the category.
How to prepare without inventing folklore
Prep the practice that invited you, not a generic "litigation consulting" playlist.
- Utilities / energy track: residual demand, pivotal supplier logic, cost of capital as a regulatory parameter, what a rate order decides.
- Antitrust track: market definition humility, unilateral vs coordinated effects vocabulary, damages as a separate question from liability.
- Transfer-pricing track: functional analysis and comparables at a high level, not a full OECD treatise recited from memory.
- All tracks: explain a chart in 60 seconds (axes, shock, two competing stories). Behavioral answers should show you translating technical work for a non-economist counsel.
Do not bluff physics or statute. Saying "I would need the constraint topology" or "I would ask how the proxy group was screened" beats a confident wrong model.
Practice this before your loop
Assignment: take the Clearwater numbers above and, without notes, recompute the $12.9m gap, then write three sentences naming (1) the regulatory question, (2) what would reverse you, and (3) the next three documents you would request. Time yourself to eight minutes.
Then run one timed math drill and one synthesis drill so the oral version stays tight. If you want a full spoken rep, use the live voice case as stamina practice, remembering the content will be strategy-shaped; your job is to force the expert-draft instinct into your debrief notes. Everything on CoachNed is open for seven days with no card; then $120 for a recruiting season or $49 a month.
Frequently asked questions
Does NERA publish an official case-interview guide?
No. The firm describes applications, interviews, and internships on its careers FAQ. Anything beyond that (exact round counts, difficulty scores) is candidate-channel rumor. Confirm your invite with recruiting.
Do I need a power-markets internship to interview for energy?
No. You need not to invent transmission physics. Saying what you would ask for next is better than a fake stack diagram. Coursework in micro, econometrics, or regulation helps more than buzzwords.
Is a NERA interview the same as Mercer or Oliver Wyman?
No. NERA is economic consulting and expert work under Marsh. Mercer and Oliver Wyman are different Marsh McLennan businesses with different interview content. Do not recycle those stories as if they were interchangeable.
Will there be a written exercise?
Sometimes. NERA says some candidates must submit a writing sample with the application, and the interview may include a case study. PhD and experienced loops may center on papers. Treat clear written economics as part of the job, not optional polish.
How is NERA different from other economic consulting firms?
Public practice pages emphasize regulatory economics in power and utilities, antitrust analysis and testimony, and transfer pricing, among other capabilities. Peer firms overweight different mixes of merger IO, securities empirics, or general applied micro. Match prep to the group that invited you.
Sources
- About NERA — founding year (1961), 65-year mark in 2026, Marsh subsidiary language, expert-testimony positioning. Checked 2026-09-24.
- Careers: Open Roles and FAQs — application materials, seasonal junior hiring, case-study possibility, internships, hybrid note, Marsh jobs routing. Checked 2026-09-24.
- Power, Utilities, and Renewables — rate regulation, cost of capital, market design, market-power mitigation, regulatory proceedings. Checked 2026-09-24.
- Antitrust and Competition — scope of competition work and expert submissions. Checked 2026-09-24.
- Transfer Pricing — in-house transfer-pricing economics practice. Checked 2026-09-24.
CoachNed is independent and not affiliated with NERA Economic Consulting, Marsh, Marsh McLennan, McKinsey, BCG, Bain, or other firms named here for interview-style practice.