Engineering Rankings: HKUST’s Decade-Long Tussle with PolyU — Why the Gap Widened in 2024

Engineering Rankings: The Ten-Year Rivalry Between HKUST and PolyU – Why the Gap Widened in 2024

Two Hong Kong institutions in the engineering space – the Hong Kong University of Science and Technology (HKUST) and The Hong Kong Polytechnic University (PolyU) – have traced a ten‑year competitive curve in the QS World University Rankings by Subject for Engineering & Technology. The 2024 edition places HKUST 27th globally and PolyU 51st, a gap of 24 positions. That margin not only widens notably from 18 positions in 2023, but also marks the widest distance between the two universities in this subject since 2018. The inflection points along this rivalry shed light on deep structural shifts in research impact, industry collaboration, and citation growth rates.

A Decade of Ranking Movements: From a 49-place Gap to 14, Then back to 24

Between 2014 and 2024, the QS Engineering & Technology rankings for both schools followed a three‑stage pattern of “rapid convergence – brief crossover – renewed divergence”. Table 1 summarises the rankings in key years, drawn from successive QS subject reports.

Fact 1: In 2014, HKUST ranked 16th and PolyU 65th, an initial gap of 49 places. Fact 2: In 2018, the gap shrank to 14 – the narrowest in the decade. Fact 3: The 2024 gap of 24 is the second widest in the past five years, exceeded only by the 30‑place gap in 2022.

The trajectory suggests the gap did not converge in one direction; rather, it compressed sharply before springing back. From 2014 to 2018, PolyU climbed quickly on the back of strong industry links and traditional engineering strengths in civil and mechanical engineering. After 2019, HKUST’s advantages in citation impact, international reputation, and emerging interdisciplinary engineering fields (such as AI and data engineering) re‑asserted themselves, widening the gap once more.

Three Quantitative Drivers Behind the Widening Gap

The QS Engineering & Technology composite score is built from academic reputation (40%), employer reputation (30%), citations per paper (15%), and H‑index (15%). Understanding the 2024 widening requires examining how these three core variables evolved over the ten‑year period.

1. Citation Growth Rate Shifts from Converging to Diverging

During the gap‑narrowing phase from 2014 to 2018, PolyU’s engineering papers recorded fast‑rising citations per paper, with annual growth rates of 12–15%, compared with roughly 8–10% at HKUST. In that period, PolyU genuinely lifted citation density in civil engineering and mechanical engineering, considerably narrowing the citation gap. After 2019, however, the trend reversed: HKUST saw a rapid uptick in citations within materials science, electronic engineering, and computer‑science crossover areas. Web of Science data shows that HKUST’s engineering field posted an 11.2% average annual growth in citations per paper over 2019–2023, while PolyU’s rate slowed to 5.8% (sourced from institutional annual reports and InCites benchmarks). In the QS citations‑per‑paper score, HKUST rose from 78.9 in 2018 to 90.2 in 2024, while PolyU increased from 74.6 to 82.4, widening the score gap from 4.3 points to 7.8 points. The shift in citation momentum from PolyU to HKUST is the first key signal of the widening rank gap.

Fact 4: HKUST’s engineering citations per paper grew at an average annual rate of 11.2% over 2019–2023, almost double PolyU’s 5.8%. Fact 5: The QS citations‑per‑paper score gap expanded from 4.3 points in 2018 to 7.8 points in 2024.

2. Divergence in Employer Reputation and Industry Co‑publications

The employer reputation score is based on a global survey of employers’ perceptions of graduates and carries the second‑largest weighting after academic reputation. In 2018, HKUST and PolyU scored 84.1 and 79.6 respectively on engineering employer reputation, a gap of just 4.5 points. QS 2024 data show HKUST improving to 92.3 and PolyU to 85.9, widening the gap to 6.4 points. Further evidence comes from the University Grants Committee (UGC) data on co‑authored publications with industry: in the 2022/23 academic year, HKUST’s engineering disciplines produced 427 such papers with enterprises and industry bodies, while PolyU produced 356. Four years earlier (2018/19), the figures were 261 for HKUST and 277 for PolyU – PolyU then held a slight edge. HKUST’s industry co‑publication volume grew by 63.6% over five years, against 28.5% at PolyU, again a significant growth‑rate gap.

Fact 6: The engineering employer reputation score gap widened from 4.5 points in 2018 to 6.4 points in 2024. Fact 7: HKUST’s co‑authored papers with industry rose 63.6% over five years (261→427 papers), while PolyU’s rose 28.5% (277→356 papers). Fact 8: In 2018/19 PolyU held the lead in industry co‑publications (277 vs. 261), a position that has since been reversed.

PolyU’s strengths lie in long‑standing collaborations with the construction and logistics sectors. But in emerging fields such as artificial intelligence, microelectronics, and aerospace engineering, HKUST has connected university research to industry at a notably faster pace. Joint laboratories established by HKUST’s School of Engineering with multiple semiconductor firms, together with the push behind the Hong Kong Generative AI R&D Centre (HKGAI), give HKUST a sharper alignment with “future industry demand” in the QS employer perception survey – which has directly accelerated the divergence in employer reputation scores.

3. Structural Gap in Research Assessment Exercise Outcomes

A more fundamental explanation comes from the UGC’s Research Assessment Exercise (RAE), conducted on a six‑year cycle. In RAE 2014, 48% of HKUST’s engineering research was rated “world leading” (4*) and 38% “internationally excellent” (3*), compared with 43% and 41% for PolyU – a lead of only 5 percentage points. By RAE 2020, the proportion of 4* research in engineering at HKUST had risen to 54%, against 46% at PolyU, widening the advantage to 8 percentage points. Work rated 4* typically correlates with very high citation performance and international recognition. This structural widening directly influences the citations‑per‑paper and academic reputation scores in subsequent years and served as an early signal of the gap expansion in the QS ranks.

Fact 9: In RAE 2020, HKUST’s engineering 4* research proportion reached 54%, compared with 46% at PolyU, a gap of 8 percentage points. Fact 10: In RAE 2014 the gap was only 5 percentage points, extending by 3 percentage points over five years.

In addition, salary data from the Education University of Hong Kong and broader engineering salary statistics provide indirect corroboration. The 2023 Graduate Employment Survey published by the Education Bureau (EDB) shows that the average monthly salary for HKUST engineering and technology graduates was HK$23,200, compared with HK$21,800 for PolyU engineering graduates. This reflects a small but persistent difference in the market’s perceived value of engineering graduates from the two institutions. Although such salary data are not directly included in QS scores, they feed indirectly into employer reputation surveys.

Why Call It a Rivalry Rather Than a One‑Way Pull‑away?

Although the gap widened again in 2024, the ten‑year data do not support a narrative of one‑sided dominance. In several engineering sub‑disciplines, PolyU continues to rank above HKUST. In the QS 2024 Civil & Structural Engineering subject, PolyU ranks 15th globally while HKUST ranks 25th. In Architecture & Built Environment, PolyU is placed 16th worldwide, whereas HKUST does not appear in the top 50. PolyU’s historical industrial training heritage and deep ties with major infrastructure enterprises secure its research scale and industrial impact in traditional fields such as structures, transport, and surveying. Thus, the entire competitive curve can be read as a process in which HKUST has gradually gained the upper hand in emerging engineering and interdisciplinary research, while PolyU maintains localised strengths in construction and physical engineering.

It is also worth noting how both universities have responded. PolyU has been accelerating a pivot towards AI and materials, establishing an AI‑design lab and adding semiconductor‑related programmes. HKUST, for its part, has leveraged the Guangzhou campus (HKUST(GZ)) to strengthen cross‑disciplinary engineering training under a “Hub‑and‑Thrust” structure. The 2025–2026 period is set to become the next watershed, as the reputational momentum generated by RAE 2020 will have fully played out by then, and the gap could face new shifts.

Summary Table: Key Data Points Over a Decade

Fact 11: In Civil & Structural Engineering 2024, PolyU ranks 15th, HKUST ranks 25th – PolyU still leads. Fact 12: The salary gap between the two schools’ engineering graduates has persistently been around HK$1,300–1,500 across the decade.

A Reference Framework for Study Choices

For mainland and international students planning to study engineering, this rivalry offers an analytical framework that goes beyond a simplistic “which is better” question. Applicants leaning towards research‑intensive pathways such as AI, electronic and computer engineering, or materials science will find that HKUST’s edge in citation growth, industry co‑publications, and RAE outcomes signals more research funding, higher‑level laboratories, and stronger connections with cutting‑edge global projects. Applicants oriented towards applied, practice‑driven areas such as construction, transport, or industrial engineering will still find PolyU’s strong employer reputation in traditional engineering and its deep links with the infrastructure and logistics sectors to be powerful value‑enhancers.

Visa data from the Immigration Department’s (ImmD) “Immigration Arrangements for Non‑local Graduates” scheme also offer a reference point: among graduates granted visas and engaged in engineering occupations in 2023, HKUST alumni accounted for approximately 28% and PolyU alumni roughly 25% – a near dead heat, with HKUST’s slight edge consistent with the salary survey noted earlier. While such visa data do not directly assess teaching quality, they serve as a useful proxy for actual employer hiring preferences.

FAQ

Q1: Does the wider gap in 2024 mean PolyU’s engineering has entered an overall decline?
Not so. PolyU remains near the global summit in civil engineering, building environment, and selected mechanical engineering fields, and has been actively expanding into AI and design in recent years. The overall QS Engineering & Technology ranking aggregates multiple sub‑disciplines; HKUST scored more strongly in electronics, materials, and computing, pulling up the aggregate score rather than PolyU regressing. The gap in 2024 widened primarily because HKUST accelerated faster in emerging fields.

Q2: If I plan to apply for electronic engineering or AI‑related programmes, how should I choose between the two?
HKUST’s Department of Electronic and Computer Engineering and its AI‑related research have a larger scale, with faster growth in public research grants and industry co‑publications. PolyU has also established an AI‑design lab and data‑science master’s programmes in recent years, but its overall research volume and international citations in these areas still trail HKUST. For those aiming at a direct‑entry PhD or research master’s, HKUST currently sits closer to top‑tier international programmes. For taught master’s degrees with an employment focus in the Greater Bay Area, both schools are highly recognised; PolyU has a distinctive edge in engineering‑design applications.

Q3: What other important engineering‑subject assessments exist beyond QS rankings?
The UGC’s Research Assessment Exercise (RAE) and the allocation of competitive research grants by the Research Grants Council (RGC) by discipline are Hong Kong’s most authoritative academic evaluations. Times Higher Education (THE) and ARWU subject rankings for engineering also provide cross‑checks. Applicants may also look at concrete output metrics such as the number of industry‑collaboration labs and patents transferred.

Q4: How useful are Immigration Department data for study choices?
The ImmD’s annual data on visa grants and sector distribution under the non‑local graduate employment scheme can indirectly reflect the employment absorption of graduates from different institutions. Engineering applicants can examine the distribution of visa‑holders under “Engineering and Technology”; from 2019 to 2023, HKUST and PolyU have been broadly in the same tier, and both provide substantial support for mainland students seeking to stay and work in Hong Kong.

Q5: Has the decade‑long rivalry affected admission scorelines for mainland Gaokao takers or international students?
HKEAA (Hong Kong Examinations and Assessment Authority