This section first reports the results of multivariate logistic and OLS regression models that are used to test hypotheses 1 and 2, respectively. It then reports the results of robustness checks on the baseline results by decomposing the overall findings based on each of the US and EU firm sub-sample firms.
6.3. Variations Between EU Versus US Firms
To better delineate the standard finance risk management and alternative institutional theory explanations for the baseline findings (H3), the logistical and OLS multivariate empirical tests conducted for the entire sample of firms in
Table 4 and
Table 5 are repeated for each of the 150 US and European sub-sample firms in
Table 7 and
Table 8, respectively.
Table 7 shows that stock price volatility is positively associated with ERM adoption propensity for both US () and European sub-sample firms, although only at the 5% and 10% levels of statistical significance, respectively. Additionally, leverage (but not firm size) is statistically significantly associated with ERM adoption propensity for both sub-sample firms. For European firms only, it is also positively associated with the total notional value of hedged derivatives. These results suggest that the incentives facing both US and European firms to adopt ERM are relatively consistent, supporting a financial risk management explanation.
By contrast,
Table 8 shows that while ERM adoption is strongly and positively statistically significantly associated with firm risk for both the US sub-sample and European sub-sample firms.
In contrast to the findings of the logistical regression, the OLS regression indicates firm risk is not related to ERM adoption propensity for European sub-sample firms. However, there is a consistent, negative association between firm size and firm risk for both sub-samples. This suggests that there may be alternative institutional reasons why European firms tend to adopt ERM practices, which might be related to their need to adhere to more relatively stringent regulatory requirements for disclosure related to broader climate and systemic risk factors.
Finally, a multivariate OLS regression is also performed on the determinants of risk-to-reward ratio as reported for the entire sample in
Table 6, separately for US and European sub-sample firms. The results are reported in
Table 9.
There is no statistically significant relationship between firm risk-to-reward ratio and ERM adoption propensity for both sub-sample firms. By contrast, there is a positive and statistically significant relationship between both firm size and total notional value of hedging to the risk-to-reward ratios for both US and European sub-samples. Moreover, the overall F and adjusted R-squared statistics suggest that the models do not explain firms’ risk-to-reward ratios. This suggests that ERM adoption is not a major factor in explaining multinational firms’ overall risk-to-reward ratios, which is in contrast to the findings of previous research.
6.4. Robustness Tests
In this section, several robustness tests are conducted on the baseline results reported above (based on the findings above, the robustness checks reported do not incorporate further analysis of the determinants of sample firms’ risk-to-reward ratios). These involve industry-based grouping, incorporating additional country-based macroeconomic variables, changing the dependent variable definition and testing for sub-sample variations between firms with relatively high and low levels of leverage and derivative usage.
Firstly, because ERM adoption practices could vary between industries. Lam [
2] argues that manufacturers face relatively greater technology risk and challenges, production-related labor resilience issues, and supply chain issues that are subject to geopolitical- and climate-related systemic risk, being significantly more of an issue facing manufacturing firms than non-manufacturing firms. Exactly 50% of the sample firms are manufacturing-based. The analysis is therefore repeated where the sample firms are decomposed into manufacturing and non-manufacturing industry sub-groups.
Table 10 and
Table 11 report the same logistic and OLS regression as reported in
Table 4 and
Table 5, respectively, but where sample firms are partitioned by whether the firm is manufacturing-based or not.
The ERM incentive logistic multivariate tests (
Table 10) results suggest that there is no statistical association between ERM incentive probability and total firm risk (
SDR), contrary to the results of the baseline tests and therefore rejecting the prediction of H1. Some control variables also have different significant associations with ERM choice incentives between the two sub-samples. For instance, compared to the manufacturing firm sub-sample, for non-manufacturing sub-sample firms, ERM choice is positively associated with foreign operations (
FORS) and total notional value of hedges (
TVH). By contrast, there is a significant association between firm size (
LNSIZE), book to market (
BTM) and pension funding (
PFUND) only for the manufacturing firm sub-sample.
Similarly, the OLS regression multivariate tests of the determinants of total firm risk (SDR) reported in
Table 11 show that ERM is not associated with total firm risk. However, for both manufacturing and non-manufacturing sub-sample firms, there is a statistically significant negative relationship between total firm risk and both firm size (
LNSIZE) and leverage (
LEV). For the other control variables, there is only a positive statistical relationship between firm risk (
SDR) and book-to-market ratio (
BTM) for the manufacturing firms, while there is only a positive statistical relationship between firm risk and notional value of hedging for the non-manufacturing firms.
As a further robustness check, two additional control cross-country-level macroeconomic control variables are included in the multivariate tests, which could explain cross-section variation facing both firms’ incentives to adopt ERM and total firm risk. Country-level cultural factors that are included are (1) the well-known Kaufmann index of institutional development (
ID), which is constructed based on a multivariate statistical analysis of six different institutional-level factors associated with “Voice and Accountability”, “Regulatory Quality”, “Control of Corruption” and other factors [
42]. Additionally, the country-based stock market development index measure contained in the World Bank Global Development Database is also included as another country-level macroeconomic control variable (
SMD).
Table 12 and
Table 13 report the logistic multivariate regression and OLS multivariate tests used to examine the determinants of ERM choice and total firm risk, respectively, that include these additional macroeconomic variables.
Table 12 shows that the propensity to adopt ERM is positively associated with firm total risk, even after controlling for other country-wide macroeconomic factors. There is also a statistically significant negative (positive) association with international development (
ID) (stock market development (
SMD)), indicating that macroeconomic factors are important determinants of firms’ ERM adoption propensity.
Table 13 reports that there is a positive and statistically significant relation between SDR and ERM adoption choice, even after controlling for international-level factors. However, there is only a positive and statistically significant relation between firm risk and stock market development (
SMD).
A further robustness check is conducted, which tests the sensitivity of the results to a change in the definition of the dependent variable, ERM choice. Fraser et al. [
3] claim that ERM adoption has been diluted by several factors that impede their effective ERM implementation, such as an overemphasis on reporting and insufficient injection into the strategic managerial decision-making processes. Furthermore, Florio and Leoni [
26] introduce a new and more complete measure for ERM implementation, which they claim, “concerns not only corporate governance bodies dedicated to risk management, but also the characteristics of the risk assessment process”.
To address these criticisms, the definition of ERM adoption is amended to incorporate a “credible” ERM adoption option, whereby firms have voluntarily reported that they have explicitly incorporated ERM into their overall governance and risk management structures. Therefore, instead of a binary one–zero variable definition as used consistently in prior literature, a categorical “level 2” ERM adoption level was identified, based on a review of the publicly available Management Discussion and Analysis section of the annual report. This procedure identified only 26% (instead of 63%) of the sample firms that had demonstrated via public voluntary disclosures that they had produced “credible” ERM processes, as opposed to “standard” ERM processes produced more generally in compliance with reporting regulations. Therefore, the empirical multivariate analysis reported above is repeated, but instead of a binary logistical model, an ordinal logistical regression model is used. The results are reported in
Table 14, whereby, reflecting a change in definition of the dependent variable, an ordinal logistical regression is substituted for a binary logistical regression model first-stage specification.
The empirical results show that a change in the definition of the dependent variable ERM from a binary to categorical variable reduces the strength of the statistical association with firm risk. Although it is still positive, it is not statistically significant. By contrast, the relation between the amended “credible” definition of ERM adoption and other control variables is statistically and positively associated with both firm leverage (LEV) and stock market development (SMD) at the 1% level of statistical significance.
The final robustness checks concern the relative importance of both leverage and notional value of hedged derivatives in affecting the relationship between ERM adoption propensity and firm risk. Firstly,
Table 15 and
Table 16 report the effects on the propensity to adopt ERM and the determinants of firm risk, respectively, when the sample firms are partitioned based on the median (i.e., 5.72% of total assets) of the key control variable notional value of hedged derivatives (
TNV).
Table 15 shows that, whereas there is a positive and statistically significant relationship between ERM adoption propensity and firm risk for low derivative hedging firms, it is not statistically significantly associated with high derivative hedging firms. Furthermore, there is a negative association between hedging (
TNV) and ERM propensity for low-risk sub-sample firms, but there is no statistical association between these variables for high derivative usage sub-sample firms. Conversely,
Table 16 shows that there is a positive and statistically significant relationship between ERM adoption choice and total firm risk for both high- and low-derivative-usage firms. Additionally, there is a consistent and statistically negative association between total firm risk and the notional value of derivatives for both high- and low-derivative-usage sub-sample firms.
Finally,
Table 17 and
Table 18 report the effects on the propensity to adopt ERM and the determinants of firm risk, respectively, when the sample firms are partitioned based on the medians of the key control variable firm leverage (
LEV).
Table 17 shows that only high-leverage sub-sample firms exhibit a positive and statistically significant relationship between both ERM adoption propensity leverage (
LEV) and total firm risk. Equivalently,
Table 18 indicates a positive and statistically significant relationship between total firm risk and both ERM adoption and firm leverage for only the high-leverage sub-sample firms.