Impact of corporate tax reform on firm innovation Exploit 2004 VAT pilot tax reform in NE China DID Design: \(Y_{it} = \beta_0 + \beta_1VAT_i + \beta_2 FC_t + \beta_3(VAT_i \times FC_t) + \epsilon_{it}\) Source: Howell, A. (2016), Research Policy.
Hidalgo et al. (2007) proximity measure: \[\phi_{ij}= min(Prob(RCA_i^k > 1|RCA_j^k > 1), Prob(RCA_j^k>1|RCA_i^k >1))\] Effects of technological related spillovers on: Firm Productivity (Howell, A. 2017, Economic Geography) Firm Innovation Process (Howell, A. R&R Regional Studies) Absorptive Capacity (Howell, A. R&R Industrial & Corporate Change)
2009: 20% of firms in some kind of EDZ Measure Productivity Spillovers: Matching w/ DID & Event Analysis \[Y_{ic}^{s} = \beta_0 + \delta After_{ic}^{s} + \beta_1 EDZ_{ic}^{ml} + \delta_1(After_{ic}^{s} \times EDZ_{ic}^{ml} ) + u_{ic}\] 15% increase in productivity, s=0 Source: Howell, 2019, Journal of Regional Science
7,000+ City Industrial Development Reports, 2001-2013 Counterfactual Results: Space-Neutral Policy \(\uparrow\) average TFP by 15%
1.5 Million land transactions at parcel level Corruption proxy: gap between actual and paid price Link to urban sprawl patterns across cities