| 1. |
- Braunerhjelm, Pontus, 1953-, et al.
(författare)
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Born globals – presence, performance and prospects
- 2019
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Ingår i: International Business Review. - : Elsevier. - 0969-5931 .- 1873-6149. ; 28:1, s. 60-73
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Tidskriftsartikel (refereegranskat)abstract
- The concept born global firms has gained a spectacular increase in interest from both academic and political circles. Rigorous quantitative treatment of born global firms are however rare in the international business/economics literature. Implementing unique data on all Swedish start-ups during 1998–2008 in the manufacturing sector, we conclude that born global firms are a very rare event, that their prevalence seems invariant to time, and that they perform similar to other matched “twin” firms with regard to profitability and productivity but report a considerably higher growth in employment and sales. These results are robust to a wider definition of born global firms and to the timing of performance measurements.
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| 2. |
- Braunerhjelm, Pontus, 1953-, et al.
(författare)
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Employees' entrepreneurial human capital and firm performance
- 2023
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Ingår i: Research Policy. - : Elsevier. - 0048-7333 .- 1873-7625. ; 52:2
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Tidskriftsartikel (refereegranskat)abstract
- We introduce a new measure of human capital, defined as employees' former involvement in entrepreneurship. Such entrepreneurial human capital (EHC) complements traditional human capital measures accumulated through work experience and education. Using detailed longitudinal register data, we track the previous years of entrepreneurial experience for the population of employees in Swedish private sector firms. We provide evidence that higher EHC among employees is associated with significantly higher levels of firm productivity. The baseline result implies that a 10 % increase in employees being former entrepreneurs increases firm-level productivity by 3.9 %. Additionally, we provide evidence that heterogeneity in employees' previous entrepreneurial experience (e.g., the reason for entering and exiting entrepreneurship, type of venture, length of entrepreneurial experiences, and relatedness of technology) influences the impact of EHC on productivity. The results are shown to be robust to various estimation techniques, alternative definitions of EHC, and other performance measures. © 2022 The Authors
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| 3. |
- Braunerhjelm, Pontus, 1953-, et al.
(författare)
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Labour market mobility, knowledge diffusion and innovation
- 2020
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Ingår i: European Economic Review. - : Elsevier B.V.. - 0014-2921 .- 1873-572X. ; 123
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Tidskriftsartikel (refereegranskat)abstract
- Utilising a unique Swedish matched employer–employee dataset, which has been pooled with firm-level patent application data, we provide new evidence that knowledge workers’ mobility has a positive and strongly significant impact on firm innovation output, as measured by firm patent applications. The effect is statistically and economically highly significant for knowledge workers who have previously worked in a patenting firm (the learning-by-hiring effect), whereas only limited impact could be detected for firms losing knowledge workers (the learning-by-diaspora effect). No effects were detected for inexperienced university graduates. Finally, the effect is more pronounced when the joining worker originates from within the same region. © 2020 Elsevier B.V.
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| 4. |
- Braunerhjelm, Pontus, 1953-
(författare)
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The Relation Between Firm-Specific Intangibles and Exports
- 1996
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Ingår i: Economics Letters. - 0165-1765 .- 1873-7374. ; 53:2, s. 213-219
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Tidskriftsartikel (refereegranskat)abstract
- The main issue addressed in this paper concerns the relationship between firms' endowments in intangible proprietary assets and their export performance. The impact of investments in foreign production capacity on exports is taken into account in the empirical analysis.
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| 5. |
- Eriksson, Anders, 1953-
(författare)
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Criteria for optimality in movements
- 2006
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Ingår i: Journal of Biomechanics. - 0021-9290 .- 1873-2380. ; 39:s1, s. S54-S54
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Tidskriftsartikel (refereegranskat)
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| 6. |
- Eriksson, Anders, 1953-, et al.
(författare)
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Engineering computational technology
- 2007
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Ingår i: Advances in Engineering Software. - : Elsevier BV. - 0965-9978 .- 1873-5339. ; 38:11-12, s. 723-725
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Tidskriftsartikel (refereegranskat)
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| 7. |
- Rubel, Marek J., 1953-, et al.
(författare)
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Fuel removal from plasma-facing components by oxidation-assisted technique : An overview of surface morphology after oxidation
- 2007
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Ingår i: Journal of Nuclear Materials. - : Elsevier. - 0022-3115 .- 1873-4820. ; 363-365, s. 877-881
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Tidskriftsartikel (refereegranskat)abstract
- Oxygen-assistedfuelremoval is reported for laboratory-prepared a-C:D films and for layers obtained by boronisation in a tokamak and then exposed to a helium–oxygen glow discharge in TEXTOR. Oxidation of thick mixed-material co-deposits under laboratory conditions is also presented. The essential results are following: (i) laboratory-prepared amorphous deuterated carbon (a-C:D) layers are decomposed efficiently by the He–O2 glow: D and C contents are decreased by a factor of 45–220 and 25–60, respectively; (ii) the same treatment of the boronised films leads to the release of D but no removal of carbon is observed; (iii) the thermal oxidation (at 300 °C in air under laboratory conditions) of co-deposits on PFC and probes exposed to the SOL reduces the D content by a factor of 4–5 after 2 h, whereas nearly complete fuelremoval (98%) occurs after 10 h at 300 °C. The study shows that the fuelremoval efficiency is dependent on the overall composition of the mixed layer. It is high from pure a-C:D films but distinctly less efficient from real co-deposits.
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| 8. |
- Aad, G., et al.
(författare)
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Constraints on the Higgs boson self-coupling from single- and double-Higgs production with the ATLAS detector using pp collisions at √s=13 TeV
- 2023
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Ingår i: Physics Letters B. - : Elsevier B.V.. - 0370-2693 .- 1873-2445. ; 843
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Tidskriftsartikel (refereegranskat)abstract
- Constraints on the Higgs boson self-coupling are set by combining double-Higgs boson analyses in the b¯bb¯b, b¯bτ +τ − and b¯bγγ decay channels with single-Higgs boson analyses targeting the γγ , Z Z∗, W W ∗, τ +τ − and b¯b decay channels. The data used in these analyses were recorded by the ATLAS detector at the LHC in proton–proton collisions at √s = 13 TeV and correspond to an integrated luminosity of 126–139 fb−1. The combination of the double-Higgs analyses sets an upper limit of μH H < 2.4 at 95% confidence level on the double-Higgs production cross-section normalised to its Standard Model prediction. Combining the single-Higgs and double-Higgs analyses, with the assumption that new physics affects only the Higgs boson self-coupling (λHHH ), values outside the interval −0.4 < κλ = (λHHH /λ ) < 6.3 are excluded at 95% confidence level. The combined single-Higgs and double-Higgs analyses provide results with fewer assumptions, by adding in the fit more coupling modifiers introduced to account for the Higgs boson interactions with the other Standard Model particles. In this relaxed scenario, the constraint becomes −1.4 < κλ < 6.1 at 95% CL
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| 9. |
- Aad, G., et al.
(författare)
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Measurement of the polarisation of W bosons produced in top-quark decays using dilepton events at √s=13 TeV with the ATLAS experiment
- 2023
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 843
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Tidskriftsartikel (refereegranskat)abstract
- measurement of the polarisation of W bosons produced in top-quark decays is presented, using proton–proton collision data at a centre-of-mass energy of √s=13 TeV. The data were collected by the ATLAS detector at the Large Hadron Collider and correspond to an integrated luminosity of 139 fb−1. The measurement is performed selecting events decaying into final states with two charged leptons (electrons or muons) and at least two b-tagged jets. The polarisation is extracted from the differential cross-section distribution of the cosθ* variable, where θ* is the angle between the momentum direction of the charged lepton from the W boson decay and the reversed momentum direction of the b-quark from the top-quark decay, both calculated in the W boson rest frame. Parton-level results, corrected for the detector acceptance and resolution, are presented for the cosθ* angle. The measured fractions of longitudinal, left- and right-handed polarisation states are found to be f0=0.684±0.005(stat.)±0.014(syst.), fL=0.318±0.003(stat.)±0.008(syst.) and fR=−0.002±0.002(stat.)±0.014(syst.), in agreement with the Standard Model prediction.
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| 10. |
- Aad, G., et al.
(författare)
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Search for flavour-changing neutral-current couplings between the top quark and the photon with the ATLAS detector at √s=13 TeV
- 2023
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 842
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Tidskriftsartikel (refereegranskat)abstract
- This letter documents a search for flavour-changing neutral currents (FCNCs), which are strongly suppressed in the Standard Model, in events with a photon and a top quark with the ATLAS detector. The analysis uses data collected in pp collisions at √s = 13 TeV during Run 2 of the LHC, corresponding to an integrated luminosity of 139 fb−1. Both FCNC top-quark production and decay are considered. The final state consists of a charged lepton, missing transverse momentum, a b-tagged jet, one high-momentum photon and possibly additional jets. A multiclass deep neural network is used to classify events either as signal in one of the two categories, FCNC production or decay, or as background. No significant excess of events over the background prediction is observed and 95% CL upper limits are placed on the strength of left- and right-handed FCNC interactions. The 95% CL bounds on the branching fractions for the FCNC top-quark decays, estimated (expected) from both top-quark production and decay, are B(t → uγ ) < 0.85 (0.88) × 10−5 and B(t → cγ ) < 4.2 (3.40) × 10−5 for a left-handed tqγ coupling, and B(t → uγ ) < 1.2 (1.20)×10−5 and B(t → cγ ) < 4.5 (3.70)×10−5 for a right-handed coupling.
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