Overview

Portugal’s administrative data compare portfolio serial entrepreneurs’ FSE firm—the business before portfolio status—with their SSE firm—the later business that creates it. Subsequent firms are about a quarter larger unconditionally, but first firms already outperform other firms; after controls, later firms remain larger yet tend to exit more and grow somewhat more slowly. The pattern is consistent with learning and post-entry accumulation, but survival selection, resources, timing, and unobserved differences prevent a clean causal learning effect.

Learning outcomes

Subsequent portfolio firms were about a quarter larger unconditionally, a pattern compatible with learning or accumulated resources.
First firms already outperformed other firms, so portfolio status cannot be the sole origin of the observed advantage.
Adjusted exit and growth results were less favorable for subsequent firms, showing that experience does not improve every outcome.

Keywords

Portfolio entrepreneursFirst firmsSubsequent firmsLearningSelectionFinancial accumulation

Do Second Ventures Win Because Their Owners Learned?

The first-versus-subsequent-firm comparison is the closest thing in the Portuguese evidence to a test of entrepreneurial learning. It asks whether the later businesses of portfolio serial entrepreneurs outperform their own earlier businesses, rather than comparing one owner with a completely different population. That makes the question sharper, but not simple: the owners who reach a second venture have already survived an earlier selection process, and the later firm may inherit both lessons and resources from the first.

What the comparison can see

The Portuguese study calls the first business of a portfolio serial entrepreneur an FSE firm. It is the business the owner had before their ownership history qualified them as a portfolio serial entrepreneur. An SSE firm is a subsequent business—the second or later firm whose existence creates that classification. The distinction is chronological and tied to the owner’s history. It is not a rating of first firms as failures or subsequent firms as improvements.

That distinction matters because the comparison changes the baseline. A novice-versus-portfolio comparison asks how two groups of owners and firms differ. An FSE-versus-SSE comparison asks how businesses associated with the same broad type of owner differ before and after the ownership history expands. If later firms are larger, more productive, or more durable, one possible explanation is that the owner learned. If first firms already look different from other firms, however, the owner’s starting position is part of the story before any second venture appears.

The time sequence also creates an important gate. An owner must first have a business that remains observable and then become involved in another business before they can enter the subsequent-firm group. Owners whose first firms close and who never start another firm cannot appear as SSE owners. Owners who will eventually start another business but do so after the observation window may be classified differently. The comparison is therefore between firms at different points in a selected ownership path, not between randomly assigned “before” and “after” observations.

sequenceDiagram participant O as Owner participant F as First firm participant S as Survival and selection participant L as Learning and resources participant G as Subsequent firm O->>F: enters with prior traits and resources F->>S: survives, succeeds, or exits S-->>L: survival permits feedback and accumulation L->>G: later venture draws on possible learning and resources S->>G: prior outcomes select who reaches a later venture G-->>O: new firm outcomes are observed Note over S,G: The later-firm comparison mixes learning with selection

The sequence is a map of interpretive possibilities, not a claim that every arrow is measured directly. The administrative data can observe firms, owners, workers, and many realized outcomes over time. It cannot observe a clean measure of what an owner learned between two ventures, nor can it assign the same owner an otherwise identical business without that experience. The comparison is valuable precisely because it narrows the question while leaving those causal gaps visible.

The researchers’ broader distinction is between learning and selection. They use “learning” broadly enough to include improvements in owners’ skills and other ex-post forces, such as accumulating net worth.

Published by DeepMox

FAQ

What do FSE and SSE mean in the Portuguese study?

FSE means the first firm of a portfolio serial entrepreneur, while SSE means a subsequent firm that helps create the owner’s portfolio classification. The labels mark chronology, not whether a firm succeeded.

Why can a later firm be larger without proving learning?

Because size can rise through accumulated financing, reputation, opportunity choice, or a larger starting scale as well as learned skills. The Portuguese data observes the gap but not a clean counterfactual or a direct measure of what the owner learned.

Why does survival selection matter in a first-versus-subsequent comparison?

It matters because an owner must keep the earlier business observable long enough to reach a later ownership event. Owners whose first firms close quickly or whose next ventures fall after the observation window may not appear as subsequent-firm cases.

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Portfolio Entrepreneurs: First vs Subsequent Firms

Do Second Ventures Win Because Their Owners Learned?

What the comparison can see

FAQ