Submitted:
22 July 2025
Posted:
24 July 2025
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Abstract
Keywords:
1. Introduction
2. Background: The Gravity Model
3. Materials and Methods
3.1. Dependent Variable: Prosecco Export Performance
3.2. Independent Variables
3.3. Model Specification and Simulation of Tariffs Effects
3.3.1. Model Specification
3.3.2. Simulation of Tariff Effects
4. Results and Discussions
| Coeff (β) | Std. Error | p-value | |
|---|---|---|---|
| (Constant) | 13.120 | 12.339 | 0.289 |
| lnGDPItaly | -0.084 | 1.623 | 0.959 |
| lnGDPImporter | 0.644 | 0.047 | 0.000 |
| lnDistance | -0.424 | 0.085 | 0.000 |
| lnTariffs | -0.130 | 0.032 | 0.000 |
| FixTariffs | 1.394 | 0.266 | 0.000 |
| Time | 0.147 | 0.047 | 0.002 |
| Covid | 0.051 | 0.158 | 0.748 |
| Fitting of the Model | |||
| Adj- R2 | 0.522 | ||
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
| DOC | Denominazione di Origine Controllata: an Italian certification that guarantees the geographic origin and quality standards of a wine |
| DOCG | Denominazione di Origine Controllata e Garantita: a higher-tier certification than DOC, with stricter quality and production requirements. |
| GI | Geographical Indication |
| GDP | Gross Domestic Product |
| EU | European Union |
| U.S. | United States of America |
| COVID-19 | Coronavirus Disease 2019 (global pandemic) |
| LN_GDP_IMPORTER | Natural logarithm of the GDP of the importing country |
| LN_DISTANCE | Natural logarithm of the geographical distance (in kilometers) between Rome (Italy) and the capital of the importing country |
| LN_TARIFFS | Natural logarithm of tariff levels (standardized to USD per kilogram) |
| FIX_TARIFFS | Binary (dummy) variable indicating whether a fixed tariff (a set monetary amount per kg) is applied (1 = yes; 0 = no) |
| TIME | A continuous time variable (coded as 0 for 2017, 1 for 2018, etc.) to capture general temporal trends in export dynamics |
| COVID | Dummy variable equal to 1 for pandemic years (2020 and 2021) and 0 otherwise. Used to measure short-term disruptions due to COVID-19 |
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| Category | Variables | Code | Description | Data sources |
|---|---|---|---|---|
| Economic Size of Trade Partners | GDP of Italy | GDPItaly | Italy’s gross domestic product at current prices, measured in billions of U.S. dollars | World Bank Database [22] 7/23/2025 5:29:00 PM |
| GDP of importer countries | GDPImporter | The GDP of each importing country, also measured in billions of U.S. dollars. | World Bank Database [22] | |
| Geographical Distance |
Distance | The straight-line distance (in kilometers) between Rome (Italy’s capital) and the capital city of each importing country | Google Maps | |
|
Economic Distance |
Tariffs | Tariffs | A continuous variable reflecting the level of tariff barriers imposed by each importer on Prosecco. Data was standardized to U.S. dollars per kilogram of wine to ensure cross-country comparability | World Trade Organization [23] |
| Fixed tariff | FixTariffs | A binary variable that takes value 1 if the tariff is fixed (a set amount per weight unit), and 0 otherwise. | ||
| Time | Time | Time | A continuous variable. Value 0 is assigned to 2017, 1 for 2018, and so forth up to 6 for 2023. | |
| COVID | External Shocks | Covid | A dummy variable equal to 1 for observations from the pandemic years (2020 and 2021) and 0 otherwise, used to estimate the short-term shock effect of COVID-19 on Prosecco exports |
| No Tariff (0%) | Tariff 10 % | Tariff 30% | Tariff 60% | |
|---|---|---|---|---|
| Impact on 2025 (Tariffs vs No Tariff) |
-15.1% | -24.3% | -30.3% | |
| Variation 2025/24 | 19.0% | 1.0% | -10.0% | -17.1% |
| Variation 2026/24 | 40.9% | 19.6% | 6.6% | -1.9% |
| Variation 2027/24 | 66.8% | 41.7% | 26.2% | 16.2% |
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