Overview

This chapter tests whether the cross-border zombie result is instead a broad Asian slowdown, genuine exporter productivity, weak importer demand, or a China-specific story. The zombie coefficient remains negative after controlling for Asian GDP growth and exporter labor-productivity exposure, while zombie exposure is associated with lower importer GDP and productivity exposure is not. Falling prices with non-falling import value are consistent with higher quantities, though quantity is inferred. Rest-of-Asia effects reflect export composition and bilateral weights, not a ranking of countries.

Learning outcomes

Controlling for broad Asian GDP growth leaves the zombie-spillover coefficient negative, so regional slowdown alone does not absorb the result.
In the joint test, productivity exposure lowers CPI but is not significantly linked to importer GDP, unlike zombie exposure.
Falling prices with non-falling import value support an excess-supply reading, but quantity is inferred rather than directly observed.

Keywords

Zombie firmsExcess supplyProductivitySlowdownImport valueChina

What the Evidence Rules Out: Slowdown, Productivity, Demand, or China?

The trade evidence identifies a plausible route, but lower prices and weaker output can have several causes. This chapter examines what remains after the study controls for broader Asian growth and exporter productivity, then separates China from the rest of Asia. The goal is not to claim that one regression eliminates every alternative. It is to understand how each test narrows the explanation and why the visible spillover depends on trade composition as well as zombie prevalence.

A general Asian slowdown is not enough to explain the result

A broad slowdown in Asia could affect advanced economies through ordinary trade. If Asian demand weakens, importers may sell less to the region, and weaker external demand could lower their growth and inflation. The zombie-spillover index might then be acting as a proxy for regional conditions rather than identifying the consequences of zombie firms themselves.

The study addresses this by constructing a parallel exposure measure: the same predetermined trade weights multiplied by average real GDP growth across the ten Asian economies. When this GDP-growth exposure is added to the baseline specification, the zombie coefficient remains negative and becomes slightly larger in magnitude. For CPI inflation, it is about −0.143, compared with −0.135 in the baseline. For GDP growth, it is about −0.418, compared with −0.405. The GDP-growth exposure itself is significant for CPI but not for GDP growth in the combined specification.

This result changes the interpretation in a limited but important way. It shows that zombie exposure contains information beyond a broad Asian growth cycle. It does not establish that general Asian conditions are irrelevant. They can affect prices through another trade route, while zombie prevalence captures a more specific supply-side distortion. The two exposures are distinguishable in the specification rather than mutually exclusive in the real economy.

The distinction matters because the relevant question is not whether Asian weakness can lower advanced-economy activity. It plainly can. The question is whether the persistent zombie share adds a separate channel that operates through excess capacity and underpricing. The survival of the zombie coefficient after the broader growth control is evidence for that additional channel, while the remaining significant GDP-exposure result shows why it would be wrong to attribute every cross-border movement to zombies.

The control is informative precisely because it is built on the same trade relationships as the zombie index. It does not compare one group of countries that trades with Asia with another group that does not; it compares two time-varying exposures for the same advanced economies. One exposure tracks average Asian growth and the other tracks the Asian zombie share. The remaining zombie coefficient therefore asks whether two economies with similar trade links can experience different outcomes when the composition of the source-country condition differs. It still leaves room for unmeasured supply shocks that move with zombie prevalence, but it is more demanding than a simple correlation between Asian trade and importer inflation.

Published by DeepMox

FAQ

Does controlling for Asian GDP growth remove the zombie-spillover result?

No. The zombie coefficient remains negative and slightly larger in the combined specification, although Asian growth remains a separate channel.

How can import value help distinguish weak demand from excess supply?

If prices and nominal import value both fall, demand may have weakened; if prices fall while value stays flat or rises, implied quantity is higher, though it is not directly observed.

Why does rest-of-Asia exposure look stronger than China in the broad panel?

Rest-of-Asia sources send more intermediate goods to advanced economies in the weighting period, while China’s mix is more concentrated in consumer and capital goods; bilateral exposure also differs.

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Zombie Firms: Slowdown, Productivity, Demand, or China?

What the Evidence Rules Out: Slowdown, Productivity, Demand, or China?

A general Asian slowdown is not enough to explain the result

FAQ