The CEO Maturity Model — Temperament, Capability, Maturity, Fit

This module gives the course its organizing structure. Everything in Modules 1 through 5 — the CEO temperament, the personality evidence, execution versus interpersonal capability, confidence and its pathologies, humility as the governor — sorts into four levels, and the levels are ordered.

FRAMEWORK Level 1, Temperament: the dispositions selection favors — agency, ambition, resilience, optimism, uncertainty tolerance, risk tolerance, achievement drive. Level 2, Capability: the skills the job requires — strategy, decision-making, execution, talent judgment, communication, capital allocation, organizational design, negotiation, stakeholder management. Level 3, Maturity: the regulation layer — self-awareness, calibration, emotional regulation, intellectual humility, adaptability, the ability to receive bad news, the ability to distinguish ego from evidence. Level 4, Fit: whether this particular person's profile matches this company, this size, this industry, this lifecycle stage, this ownership structure, this strategic problem, this moment.

Each level presupposes the one below, and no level substitutes for a lower one. A mature, well-fitted CEO without capability is a pleasant failure. A capable, well-fitted CEO without maturity runs on the Overuse Ladder until the strengths become the reason for the exit.

In the Effectiveness Equation — Traits × Behaviors × Organizational Context × Current Moment — the model maps the terms: Temperament is Traits; Capability and Maturity are Behaviors; Fit is the product of those with Context and Moment. The model is how the course, the assessment and the fit engine talk to each other, and it is how you locate yourself.

Temperament gets you to the door, capability gets you the job, maturity keeps your strengths from becoming your failure mode, and fit decides whether any of it works here.

Most CEO development effort goes into Level 2, and most CEO failure happens at Levels 3 and 4. The model exists to make that visible: to stop treating a capability gap, a maturity gap and a fit gap as the same problem with the same remedy.

The model is a synthesis; each level rests on evidence introduced in earlier modules, and its ordering is our interpretation of how that evidence fits together.

RESEARCH FINDING— Level 1. Graham, Harvey and Puri (2013), using validated psychometric instruments in a large survey of CEOs and CFOs of public and private firms, found CEOs substantially more risk-tolerant and optimistic than population norms — about 80% of US CEOs classified as "very optimistic" against about 65% of CFOs — and those traits were associated with more acquisitions, more short-term debt and different pay structures. Cross-sectional, self-report, self-selected respondents: associations, not causes. What it supports: there is a CEO temperament, and it is unusual. What it cannot support: that the temperament produces success rather than selection.

RESEARCH FINDING— Level 2. Kaplan, Klebanov and Sørensen (2012), using structured assessments of 316 CEO candidates at 224 PE- and VC-backed companies rated on more than 30 abilities, found two main dimensions — general ability, and execution versus interpersonal — with success more strongly related to execution skills (resoluteness, efficiency, persistence) than to interpersonal ones. Kaplan and Sorensen (2021), across 2,603 assessments, found four factors: general ability, execution versus interpersonal, charisma versus analytical, strategic versus managerial; CEO candidates scored higher on all four, and boards appeared to favor interpersonal skills at hiring even though execution better predicted later advancement. Single assessor, selected samples, observational. What it supports: capability is measurable, multidimensional, and only partly what boards select for.

RESEARCH FINDING— Level 3. The maturity level draws on three lines. Ou et al. (2014; 2018) link other-rated CEO humility — self-awareness, openness to feedback, appreciation of others — to top-team integration and, in the 2018 study of 105 US tech SMEs, onward to ambidextrous strategy and performance; correlational, small and single-industry. Owens and Hekman (2012) identify admitting limits, spotlighting others and modeling teachability as observable behaviors, with the caveat that they work only from a leader perceived as competent. Chatterjee and Hambrick (2007; 2011) supply the negative case: proxy-measured narcissism in 111 tech CEOs was associated with bolder, more changeable strategy and more volatile results but no better average, and highly narcissistic CEOs discounted objective performance feedback while responding to praise. Malmendier and Tate (2008) found overconfident CEOs, by option-holding and press proxies, roughly two-thirds more likely to acquire, with more negative market reactions. What these support: the capacity to receive corrective information and separate ego from evidence varies among CEOs, is observable, and is associated with different outcome distributions.

RESEARCH FINDING— Level 4. Bandiera, Prat, Hansen and Sadun (2020), from time-use diaries of 1,114 manufacturing CEOs in six countries, classified CEO behavior on a manager-to-leader index and estimated that about 17% of firms had a CEO whose type did not fit the firm — explicitly a matching estimate, not a verdict that one type is better. Karaevli (2007) found no general advantage for outsider CEOs across 30 years in two industries; outsiderness helped when performance was poor or the environment turbulent. Zhang and Rajagopalan (2010) found strategic change had an inverted-U relationship with performance, more pronounced for outsiders. Custódio, Ferreira and Matos (2013) found the market pays a pay premium of about 19% for generalist CEOs, largest for complex mandates like restructurings and acquisitions. Bertrand and Schoar (2003) showed managers carry persistent styles across firms. What these support together: the same CEO profile has different value in different situations, and the situation — performance, turbulence, mandate complexity — is what decides.

RESEARCH FINDINGFRAMEWORK Hambrick (2007) supplies the theoretical spine for the ordering. Executives' characteristics shape choices most where managerial discretion is high and executive job demands are heavy — heavy demands increase reliance on heuristics and personal dispositions. Conceptual, drawing on subsequent literature. INTERPRETATION This is why maturity sits above capability: under high demands, the CEO falls back on temperament, and maturity is what determines whether that fallback is regulated. It is also why fit sits at the top: discretion decides how much any of the lower levels matters at all (Module 11).

Where the evidence is weak

No study tests the four-level model; it is a framework. The ordering claim — that higher levels presuppose lower ones and cannot substitute — is an interpretation, supported by the pattern of findings but not demonstrated. Level 3 evidence is the thinnest at CEO scale: humility studies are small, single-country or single-industry, and correlational; narcissism and overconfidence are measured by proxies. Level 4 evidence is robust on the general point that context moderates CEO effects and thin on any specific matching rule. The model should be used to structure a conversation, not to score a person.

Why four levels, and why in this order

FRAMEWORK The model answers a question boards and CEOs get wrong constantly: when a CEO is failing, or being chosen, what kind of thing is missing? The levels are four different kinds of thing.

Temperament is what you arrived with. Module 1 showed that selection — self-selection into ambitious roles, promotion selection, board selection — produces a population high in agency, ambition, resilience, optimism, uncertainty tolerance, risk tolerance and achievement drive (Graham, Harvey & Puri, 2013). Temperament is mostly not trainable in adulthood. It is the raw material. It is also the source of every rung on the Overuse Ladder: the drive that gets you to the door is the drive that, unregulated, becomes the failure.

Capability is what you learned. Strategy, decision-making, execution, talent judgment, communication, capital allocation, organizational design, negotiation, stakeholder management — these are skills with track records. They are trainable, they are assessable (Kaplan et al., 2012; Kaplan & Sorensen, 2021), and they are where most development money goes. Capability without temperament produces a superb chief of staff who does not want the top job. Temperament without capability produces a confident amateur.

Maturity is what regulates the first two. Self-awareness, calibration, emotional regulation, intellectual humility, adaptability, the ability to receive bad news, the ability to distinguish ego from evidence. Module 5's governor lives here. So does the Trait Dial: the ability to move a setting rather than run on the default is a Level 3 capacity. Maturity is trainable, but slowly, and usually through experiences that hurt.

Fit is whether the first three match the job. Not "the job" in general — this company, at this size, in this industry, at this lifecycle stage, under this ownership, with this strategic problem, in this moment. Fit is not a property of the CEO. It is a relation between the CEO and a situation, and it changes when the situation does.

Why the levels do not substitute

INTERPRETATION The ordering matters because of a tempting error: that a surplus at a higher level compensates for a deficit below.

Consider a CEO high in maturity and low in capability — a self-aware, well-regulated leader who cannot allocate capital or judge talent. The humility evidence says this CEO will build an integrated team and hear bad news early. The capability evidence says execution, not interpersonal skill, is what predicts success (Kaplan et al., 2012). Maturity will make this CEO's failure gracious, well-communicated and correctly diagnosed. It will not prevent it. Owens and Hekman (2012) made the same point from the other side: humility works only from a leader perceived as competent.

Now consider a CEO high in capability and low in maturity. This is the common case, because selection favors it: boards can see capability and cannot easily see maturity, and Module 4 showed the traits that read as capability at hiring — confidence, charisma, dominance — are the ones that produce volatile outcomes when unregulated (Chatterjee & Hambrick, 2007). This CEO will succeed until the situation changes, then run the winning setting past the point the situation can absorb. Capability does not substitute for maturity; it makes the maturity deficit more expensive, because a capable CEO climbs the Overuse Ladder faster.

Finally, consider fit without the rest. A CEO whose profile is right for the situation — a turnaround temperament in a turnaround — but who lacks the capability to execute or the maturity to stop when the turnaround is done. Fit gets the CEO hired at the right moment. It does not carry the CEO through it.

The one direction in which the model is forgiving: a strong lower level widens the range of situations a CEO can fit. A highly capable, highly mature CEO fits more companies than a highly capable, immature one, because maturity is what allows the dial to move.

Three examples of each level

FRAMEWORK For the learning objective, and for the assessment that reports against Levels 1 to 3:

• Temperament: the founder who keeps going after the second failed financing; the CEO who is comfortable deciding with 60% of the information; the executive who wants the top job more than the top job's comfort.
• Capability: the CEO who can build a three-year capital plan and defend it to a skeptical board; the CEO whose hires from the last five years are still in seat and performing; the CEO who can run a difficult negotiation to a close.
• Maturity: the CEO who changes a public position when the numbers change and says so; the CEO whose team brings bad news early because they have watched what happens to messengers; the CEO who can describe their own overuse rungs without prompting.
• Fit: the operator in a company that needs process; the generalist in a complex restructuring (Custódio et al., 2013); the outsider in a poorly performing firm in a turbulent market (Karaevli, 2007).

Self-locating with evidence

FRAMEWORK The rule for self-location is: no adjectives. "I'm decisive" is not a location; a list of the last ten decisions, how long each took, and how many were reversed is. For each level:

Temperament: what you have actually done under uncertainty, not what you believe about yourself. Risk tolerance is revealed by the biggest bet you have made with your own capital or career. Resilience is revealed by what you did in the six months after your worst professional year.

Capability: outcomes with attribution. Which of your strategies produced the results you predicted? Which of your hires are still in seat and performing two years on? What was the return on the last three capital decisions you owned? Where you cannot answer, that is the gap.

Maturity: other people's evidence, not yours. The 360 gap — the difference between your self-rating and your team's — is the most useful single number this program produces, and it echoes the humility research, where humility is rated by others precisely because self-rating is the thing at issue. The Module 5 calibration log is the other source: your predictions with confidence levels, reviewed against outcomes.

Fit: the Fit Equation from Module 12 — Industry × Scale × Lifecycle × Strategy × Governance × Problem — applied honestly to the company in front of you, and then to your profile. The multiplicative form is deliberate: fit fails at the weakest term.

How a board would use it

FRAMEWORK A board selecting a CEO, or reviewing one, can use the model to structure four different conversations that are usually collapsed into one.

Temperament screen: is this a person who wants this and can bear it? Most finalists pass; the level is a floor, not a differentiator.

Capability assessment: the structured, evidence-based part — track record by skill, references on specific outcomes, and awareness that boards tend to over-weight interpersonal impressions (Kaplan & Sorensen, 2021).

Maturity probe: the part boards skip. Ask candidates for the last decision they reversed and why; ask references how the candidate handled being wrong in public; ask the candidate's former direct reports whether bad news went up early. Look for the Two-Sentence Test in the candidate's history: can they produce evidence of both sentences?

Fit analysis: the part boards do intuitively and should do explicitly. What is the company's problem in the next three years? Which dial settings does it require? Which archetype does the situation most resemble, and what is that archetype's known failure mode? Then: does this candidate's evidence at Levels 1 to 3 match?

INTERPRETATION The model's most useful output for a board is often the diagnosis of a sitting CEO's difficulty. A capability gap calls for a COO, a coach, or a replacement. A maturity gap calls for feedback mechanisms, a strong chair, and honest conversation about the Overuse Ladder. A fit gap — the company has changed and the CEO has not — calls for a discussion about whether the CEO can move the dial, or whether the situation now needs a different profile. Treating all three as "the CEO isn't working" produces the wrong remedy two times in three.

HYPOTHESIS We suspect that most CEO exits described as capability failures are maturity or fit failures — the CEO could do the job and either could not regulate their strengths or was in the wrong situation for them. This is consistent with the evidence that outsider effects depend on context (Karaevli, 2007) and that mismatch is common (Bandiera et al., 2020), but it has not been tested directly.

Fictional composite. Pellston Health Services is a $180M-revenue provider of home-based clinical care with 2,400 employees, majority-owned by a growth-equity fund since 2022. The CEO who built it from $40M is retiring, and the board must choose a successor. Two finalists.

Renee Castellano is the internal COO, six years in role. Her capability evidence is strong: she built the scheduling and clinical-quality systems that let the company scale, her hires run three of four regions, and the fund's operating partner credits her with the margin expansion in the last two years. Her temperament is visibly CEO-shaped: she wants the job, she has run through two regulatory crises without flinching, and she decides fast. The fund's reference calls surface one pattern: two former direct reports, independently, describe her as someone who "doesn't hear it the first time." A board member who once delivered an unwelcome finding on billing compliance recalls that she pushed back hard in the meeting and came around a week later — correctly, but a week later.

Tomas Reyes is external, currently president of a $400M division of a national healthcare company. Capability is broad but less attributable: he inherited a strong division and grew it moderately. His maturity evidence is unusually good — references describe a leader whose teams "tell him everything," who reversed a major pricing decision publicly, and whose 360s are close to his self-ratings. He has never run a company with a fund on its board or a covenant in its capital structure, and his home-health experience is two years old.

The board's initial discussion collapsed the question into "who is the stronger candidate," and split. The chair reframed it using the model.

At Level 1, both pass. At Level 2, Castellano is stronger on execution and talent judgment with direct evidence; Reyes is stronger on stakeholder management and communication, with less attributable results — and the board noticed that its own warmth toward Reyes was exactly the interpersonal over-weighting the research warns about. At Level 3, Reyes is clearly stronger, and Castellano's gap is specific: she receives corrective information late and reacts before she updates. At Level 4, the board wrote down the company's problem for the next three years: integrate two acquisitions, professionalize compliance under increasing regulatory scrutiny, and prepare for an exit — an execution-heavy, control-heavy mandate in a company that already has a cohesive team.

The fit analysis favored Castellano. The maturity analysis identified what would take her down: an execution-heavy mandate under fund pressure is precisely the situation in which a CEO who hears bad news late climbs the ladder from decisiveness to impulsiveness and from confidence to arrogance. The board's decision was to appoint Castellano with three conditions built from Level 3: a board chair with explicit license to deliver unwelcome findings, a quarterly 360 on the maturity tendencies shared with the board, and a standing compliance committee that reported to the board rather than to her. Reyes was told, candidly, that the board had chosen the candidate who fit the next three years, not the better leader in the abstract.

Eighteen months later the acquisitions were integrated on plan and the compliance committee had escalated one finding over Castellano's initial objection — which she accepted, in the same meeting. The chair's note to the fund: "Level 3 is moving. It moved because we built the mechanism, not because we hoped."

Put four archetypes in Castellano's position: told by a board, at the point of appointment, that the doubt is about maturity — specifically, hearing bad news late — and that conditions are attached.

The Operator CEO treats the feedback as a process gap and proposes a fix in the same meeting: a formal escalation protocol, a dashboard for compliance findings. It is a capability answer to a maturity question. The gain is that something concrete gets built. The cost is that the CEO has not changed how she reacts when the dashboard turns red; she has changed the color of the report. The board's conditions matter more here, not less.

The Visionary CEO reframes: "The company needs conviction right now, and what you're calling a maturity gap is the same trait that got us here." Sometimes true. But the board has evidence, and the Visionary's answer is a Level 1 defense of a Level 3 finding. This CEO is most at risk of the confidence → arrogance rung under fund pressure and, having rejected the diagnosis, has no reason to use the mechanism.

The Turnaround CEO accepts the conditions instantly and without much reflection, because turnaround leaders are used to boards imposing structure, and then runs the job exactly as before. The mechanism exists and is not used. The gain is a fast start. The cost is that when the compliance committee escalates over the CEO's objection, the reaction is the same one the references described, and now it is on the record.

The Founder CEO (imagine a founder in this seat) has the most complicated response, because for a founder the feedback is about identity, not behavior. The founder may hear it as the board preparing to replace them, and respond with either capitulation or a fight over governance. The gain, if the founder can separate ego from evidence, is the biggest maturity jump available to anyone in the course. The cost, if not, is that the founder trap closes.

Castellano's actual response — pushing back in the meeting, then accepting the conditions, then using them — is Level 3 developing in real time. It was not graceful. It was effective, because the mechanism did not depend on grace.

INTERPRETATION The model's characteristic failure is mis-level diagnosis: treating a problem at one level as if it lived at another.

The most common version is the capability answer to a maturity problem. A CEO who cannot hear bad news is sent to a strategy course; a CEO who runs on one dial setting gets a better dashboard; a CEO on the dominance → intimidation rung is given a communications coach. The remedy is real, the level is wrong, and the failure continues under a new label.

The second version is the fit answer to a maturity problem: the board concludes the CEO "isn't right for this stage" and hires a successor with a different profile, when the actual problem was that the incumbent could not move the dial. The new CEO has a different default and the same rigidity, and the cycle repeats in three years. Zhang and Rajagopalan (2010) found excessive strategic change was more costly under outsiders; a board that keeps replacing fit is generating exactly that.

The third version is the maturity answer to a fit problem: coaching a well-regulated, self-aware CEO toward humility and adaptability when the job simply needs a different temperament or capability. This is the kindest failure and it wastes the most time.

The Overuse Ladder maps onto the model directly. Every rung starts as Level 1 or Level 2 strength and becomes a liability through a Level 3 deficit — the inability to notice that the situation has changed. A Level 4 change (new scale, new owner, new problem) is what usually reveals it.

Early warning signs for a CEO or board:

• The CEO's development plan is entirely Level 2 — courses, skills, exposure — and has been for years.
• The board can describe the CEO's strengths in detail and cannot name the liability each becomes.
• The CEO's self-assessment and the team's assessment have diverged and nobody has compared them.
• The company's situation has changed materially — an acquisition, a new owner, a competitive shock — and the conversation about the CEO is about performance, not about fit.
• Successive CEOs have failed in the same seat for stated reasons that differ each time.

1. For each of the four levels, write one piece of evidence — a decision, an outcome, a piece of feedback — that locates you. Which level did you find hardest to evidence, and what does that tell you?
2. What is the biggest risk you have taken with your own capital or career? What does it say about your temperament that you would not have said about yourself?
3. Name your three most consequential hires in the last five years. Where are they now? What does the pattern say about your talent judgment as a capability, not a self-image?
4. When did you last change a public position because the evidence changed? Who saw you do it? If nobody saw, does it count?
5. If your direct reports rated you on self-awareness, ability to receive bad news, and adaptability, how far from your own ratings would they land? Which direction?
6. Write down your company's strategic problem for the next three years in one sentence. Now write the CEO profile it needs. How much of that profile is you, and how much is you hoping?
7. Which of the three mis-level failures — capability answer to a maturity problem, fit answer to a maturity problem, maturity answer to a fit problem — has your board, or you, made about you?

• The Maturity Model has four ordered levels — Temperament, Capability, Maturity, Fit — and each is a different kind of thing, with a different remedy when it is missing.
• Higher levels do not substitute for lower ones: maturity without capability fails graciously, capability without maturity fails expensively, and fit without either gets you hired at the right moment and no further.
• Self-locate with evidence, not adjectives: revealed temperament, attributable outcomes, other people's ratings, and a written fit analysis of the company in front of you.
• Boards should run four separate conversations — temperament screen, capability assessment, maturity probe, fit analysis — and most skip the third.
• Most CEO failures diagnosed as capability are maturity or fit failures; treating them as the same problem produces the wrong remedy two times in three.