1. Cyhoeddwyd

   Cynllun Gweithredu Addysg Wledig

   ap Gruffudd, G., 11 Hyd 2018, 20 t. WG34576 Caerdydd : Welsh Government.

   Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall › adolygiad gan gymheiriaid

2. Cyhoeddwyd

   Free school meals 'stigma' worries could have knock-on effect

   ap Gruffudd, G., 4 Hyd 2018

   Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall

3. Cyhoeddwyd

   Bangor University experts welcome moves to counter child hunger: Research has shown the effects of poverty on a child's academic achievements in rural areas

   ap Gruffudd, G., 28 Awst 2018, The Daily Post.

   Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall

4. Cyhoeddwyd

   Free school meal funds help pay for school trips too – but self-imposed stigma stops parents claiming

   ap Gruffudd, G., 6 Medi 2018, The Conversation.

   Allbwn ymchwil: Cyfraniad at gyhoeddiad arbenigol › Erthygl Nodweddol

5. Cyhoeddwyd

   Subject and whole school level approaches used by rural schools in Wales to reduce inequalities in education and raise pupils’ attainment and achievement

   ap Gruffudd, G. & Jones, S., 12 Awst 2018, t. 1-8.

   Allbwn ymchwil: Cyfraniad at gynhadledd › Papur › adolygiad gan gymheiriaid

6. Cyhoeddwyd

   Poverty, Education, and Cultural Wealth in Welsh Schools and Communities

   ap Gruffudd, G., Spencer, L., Payne, J. & Wilde, A., 11 Ebr 2018. 23 t.

   Allbwn ymchwil: Cyfraniad at gynhadledd › Arall

7. Cyhoeddwyd

   Rural Education Action Plan

   ap Gruffudd, G., 11 Hyd 2018, 20 t. WG34576 Cardiff : Welsh Government.

   Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall › adolygiad gan gymheiriaid

8. Cyhoeddwyd

   Re-thinking Educational Attainment and Poverty (REAP) - in Rural Wales

   ap Gruffudd, G., Spencer, L., Payne, J., Wilde, A., Watkins, R., Jones, S., Thomas, E. M., Hughes, C. & O'Connor, B., 1 Tach 2017, Bangor University. 130 t.

   Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn

9. Cyhoeddwyd

   'Stigma prydau am ddim yn taro cyllidebau ysgolion'

   ap Gruffudd, G., 4 Hyd 2018

   Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall

10. Cyhoeddwyd

    Ymchwiliad i Gynlluniau Iaith yng Ngwasanaethau Strôc Gogledd Cymru: O safbwynt y claf, yr ymarferydd a’r budd-ddeiliad ar ddau bwynt mewn amser: Inquiry into Language Schemes in North Wales Stroke Services: From a patient, practitioner and stakeholder perspective at two points in time.

    ap Gruffudd, G. S., 26 Meh 2019, t. 1. 1 t.

    Allbwn ymchwil: Cyfraniad at gynhadledd › Murlen

11. Cyhoeddwyd

    Prospective utility and the equity risk premium.

    ap Gwilym, O. M., Thomas, S., Ap Gwilym, O. & McManus, I., 1 Ion 2007, Yn: Professional Investor. 17, 7, t. 24-28

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

12. Cyhoeddwyd

    Decreased price clustering in FTSE100 futures contracts following a transfer from floor to electronic trading.

    ap Gwilym, O. M., Ap Gwilym, O. & Alibo, E., 1 Gorff 2003, Yn: Journal of Futures Markets. 23, 7, t. 647-659

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

13. Cyhoeddwyd

    The impact of sovereign rating actions on bank ratings in emerging markets

    ap Gwilym, O. M., Williams, G. L. & Alsakka, R., 1 Chwef 2013, Yn: Journal of Banking and Finance. 37, 2, t. 563-577

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

14. Cyhoeddwyd

    The determinants of CDS bid-ask spreads.

    ap Gwilym, O. M., Meng, L. & Ap Gwilym, O., 1 Hyd 2008, Yn: Journal of Derivatives. 16, 1, t. 70-80

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

15. Cyhoeddwyd

    Intra-day volatility components in FTSE-100 stock index futures.

    ap Gwilym, O. M., Speight, A. E., McMillan, D. G. & Ap Gwilym, O., 1 Ion 2000, Yn: Journal of Futures Markets. 20, 5, t. 425-444

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

16. Cyhoeddwyd

    Price Clustering in Individual Equity Options: Moneyness, Maturity, and Price Level

    ap Gwilym, O. M. & Verousis, T., 1 Ion 2013, Yn: Journal of Futures Markets. 33, 1, t. 55-76

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

17. Cyhoeddwyd

    Return reversals and the compass rose: insights from high frequency options data

    ap Gwilym, O. M., Verousis, T. & Ap Gwilym, O., 1 Medi 2011, Yn: European Journal of Finance. 17, 9-10, t. 883-896

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

18. Cyhoeddwyd

    The Use of Credit Ratings in Investment Management in the US and Europe

    ap Gwilym, O. M., Cantor, R., Ap Gwilym, O. & Thomas, S., 1 Hyd 2007, Yn: Journal of Fixed Income. 17, 2, t. 13-26

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

19. Cyhoeddwyd

    Futures market liquidity under floor and electronic trading.

    ap Gwilym, O. M., McManus, I., Ap Gwilym, O., Thomas, S., Morrey, J. (Golygydd) & Guyton, A. (Golygydd), 1 Ion 2009, Liquidity: Interest Rates and Banking. 2009 gol. Nova Science, t. 111-138

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

20. Cyhoeddwyd

    Dividend stability, dividend yield and stock returns: UK evidence.

    ap Gwilym, O. M., Ap Gwilym, O., Morgan, G. & Thomas, S., 1 Ebr 2000, Yn: Journal of Business Finance and Accounting. 27, 3-4, t. 261-281

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

21. Cyhoeddwyd

    Trade size clustering and the cost of trading at the London Stock Exchange

    ap Gwilym, O. M., Verousis, T. & Ap Gwilym, O., 18 Medi 2012, Yn: International Review of Financial Analysis.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

22. Cyhoeddwyd

    Evidence on trading mechanisms.

    ap Gwilym, O. M., Ap Gwilym, O., Board, J. (Golygydd), Sutclifee, C. (Golygydd) & Wells, S. (Golygydd), 1 Ion 2002, Transparency and Fragmentation: Financial Market Regulation in a Dynamic Environment. 2002 gol. Palgrave Macmillan, t. 101-140

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

23. Cyhoeddwyd

    The components of electronic inter-dealer spot FX bid-ask spreads.

    ap Gwilym, O. M., McGroarty, F., Ap Gwilym, O. & Thomas, S., 1 Tach 2007, Yn: Journal of Business Finance and Accounting. 34, 9-10, t. 1635-1650

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

24. Cyhoeddwyd

    Size clustering in the FTSE100 index futures market.

    ap Gwilym, O. M., Ap Gwilym, O. & Meng, L., 1 Mai 2010, Yn: Journal of Future Markets. 30, 5, t. 432-443

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

25. Cyhoeddwyd

    International evidence on the payout ratio, earnings, dividends, and returns.

    ap Gwilym, O. M., Ap Gwilym, O., Seaton, J., Suddason, K. & Thomas, S. H., 1 Ion 2006, Yn: Financial Analysts Journal. 62, 1, t. 36-53

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

26. Cyhoeddwyd

    The lead-lag relationship between the FTSE100 stock index and its derivative contracts.

    ap Gwilym, O. M., Ap Gwilym, O. & Buckle, M., 1 Awst 2001, Yn: Applied Financial Economics. 11, 4, t. 385-393

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

27. Cyhoeddwyd

    Price and momentum as robust tactical approaches to global equity investing.

    ap Gwilym, O. M., Ap Gwilym, O., Clare, A., Seaton, J. & Thomas, S., 1 Hyd 2010, Yn: Journal of Investing. 19, 3, t. 80-91

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

28. Cyhoeddwyd

    Problems encountered when using high frequency financial market data: suggested solutions.

    ap Gwilym, O. M., Ap Gwilym, O. & Sutcliffe, C., 1 Ion 2001, Yn: Journal of Financial Management and Analysis. 14, 1, t. 38-51

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

29. Cyhoeddwyd

    Does the Fed Model travel well?: For short run tactical allocation, yes, but not for the long haul.

    ap Gwilym, O. M., Ap Gwilym, O., Seaton, J., Suddason, K. & Thomas, S. H., 1 Medi 2006, Yn: Journal of Portfolio Management. 33, 1, t. 68-75

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

30. Cyhoeddwyd

    Dividend yield investment strategies, the payout ration and zero-dividend stocks.

    ap Gwilym, O. M., Ap Gwilym, O., Seaton, J. & Thomas, S. H., 1 Rhag 2005, Yn: Journal of Investing. 14, 4, t. 69-74

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

31. Cyhoeddwyd

    Bid-ask spreads and the liquidity of international bonds.

    ap Gwilym, O. M., Ap Gwilym, O., Trevino, L. & Thomas, S. H., 1 Medi 2002, Yn: Journal of Fixed Income. 12, 2, t. 82-91

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

32. Cyhoeddwyd

    Prospective utility and time-varying optimal asset allocation for the UK: 1803-1995.

    ap Gwilym, O. M., McManus, I., Ap Gwilym, O. & Thomas, S., 25 Gorff 2009, Yn: International Journal of Behavioural Accounting and Finance. 1, 2, t. 95-110

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

33. Cyhoeddwyd

    Microstructure effects, bid-asks spreads and volatility in the spot foreign exchange market pre and post-EMU.

    ap Gwilym, O. M., McGroarty, F., Ap Gwilym, O. & Thomas, S., 1 Medi 2006, Yn: Global Finance Journal. 17, 1, t. 23-49

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

34. Cyhoeddwyd

    An empirical comparison of quoted and implied bid-ask spreads on futures contracts.

    ap Gwilym, O. M., Ap Gwilym, O. & Thomas, S., 1 Chwef 2002, Yn: Journal of International Financial Markets, Institutions and Money. 12, 1, t. 81-99

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

35. Cyhoeddwyd

    Price clustering and underpricing in the IPO aftermarket.

    ap Gwilym, O. M., Ap Gwilym, O. & Verousis, T., 1 Maw 2010, Yn: International Review of Financial Analysis. 19, 2, t. 89-97

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

36. Cyhoeddwyd

    The sovereign-bank rating channel and rating agencies' downgrades during the European debt crisis

    ap Gwilym, O. M., Alsakka, R., Ap Gwilym, O. & Vu, T. N., 13 Ebr 2014, Yn: Journal of International Money and Finance. 49, part B, t. 235-257

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

37. Cyhoeddwyd

    Speculate against speculative demand

    ap Gwilym, O. M., Ap Gwilym, O., Kita, A. & Wang, Q., 26 Maw 2014, Yn: International Review of Financial Analysis. 34, t. 212-221

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

38. Cyhoeddwyd

    Heterogeneity of sovereign rating migrations in emerging countries.

    ap Gwilym, O. M., Alsakka, R. & Ap Gwilym, O., 1 Meh 2009, Yn: Emerging Markets Review. 10, 2, t. 151-165

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

39. Cyhoeddwyd

    Dividends and Momentum.

    ap Gwilym, O. M., Ap Gwilym, O., Clare, A. D., Seaton, J. & Thomas, S. H., 1 Meh 2009, Yn: Journal of Investing. 18, 2, t. 42-49

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

40. Cyhoeddwyd

    In Search of Concepts: The Effects of Speculative Demand on Stock Returns

    ap Gwilym, O. M., Hasan, I., Wang, Q. & Xie, R., 2 Meh 2016, Yn: European Financial Management. 22, 3, t. 427-449

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

41. Cyhoeddwyd

    The role of payout ratio in the relationship between stock returns and dividend yield.

    ap Gwilym, O. M., McManus, I., Ap Gwilym, O. & Thomas, S., 1 Tach 2004, Yn: Journal of Business Finance and Accounting. 31, 9-10, t. 1355-1387

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

42. Cyhoeddwyd

    Credit default swaps: Theory and Empirical Evidence.

    ap Gwilym, O. M., Meng, L. & Ap Gwilym, O., 1 Maw 2005, Yn: Journal of Fixed Income. 14, 4, t. 17-28

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

43. Cyhoeddwyd

    Impact of demographic and economic variables on financial policy purchase timing decisions.

    ap Gwilym, O. M., Thomas, L. C., Thomas, S., Tang, L. & Ap Gwilym, O., 1 Medi 2005, Yn: Journal of the Operational Research Society. 56, 9, t. 1051-1062

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

44. Cyhoeddwyd

    Split sovereign ratings and rating migrations in emerging economies.

    ap Gwilym, O. M., Alsakka, R. & Ap Gwilym, O., 1 Meh 2010, Yn: Emerging Markets Review. 11, 2, t. 79-97

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

45. Cyhoeddwyd

    Fractional versus decimal pricing: evidence from the UK Long Gilt futures market.

    ap Gwilym, O. M., Ap Gwilym, O., McManus, I. & Thomas, S., 1 Mai 2005, Yn: Journal of Futures Markets. 25, 5, t. 419-442

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

46. Cyhoeddwyd

    Market structure and microstructure, in international interest rate futures markets.

    ap Gwilym, O. M., McGroarty, F., Ap Gwilym, O. & Thomas, S., 1 Medi 2010, Yn: Research in International Business and Finance. 24, 3, t. 253-266

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

47. Cyhoeddwyd

    The determinants of trading volume for cross-listed Euribor futures contracts.

    ap Gwilym, O. M., Ap Gwilym, O., Aguenaou, S. & Rhodes, M., 1 Ion 2009, Yn: European Journal of Finance. 15, 1, t. 89-102

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

48. Cyhoeddwyd

    Very long term equity investment strategies: real stock prices and mean reversion.

    ap Gwilym, O. M., Ap Gwilym, O., Seaton, J. & Thomas, S., 1 Meh 2008, Yn: Journal of Investing. 17, 2, t. 15-23

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

49. Cyhoeddwyd

    Forecasting volatility for options pricing for the U.K. stock market.

    ap Gwilym, O. M. & Ap Gwilym, O., 1 Gorff 2001, Yn: Journal of Financial Management and Analysis. 14, 2, t. 55-62

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

50. Cyhoeddwyd

    An improved algorithm for cleaning Ultra high-frequency data.

    ap Gwilym, O. M., Verousis, T. & Ap Gwilym, O., 1 Chwef 2010, Yn: Journal of Derivatives and Hedge Funds. 15, 4, t. 323-340

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid